plagiarism essay checker

Free Online Plagiarism Checker

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Possible plagiarism detected!

If you submit this paper, your institution may take disciplinary measures against you. The content requires editing and modification of parts. We know how to make it unique.

This is weighted average of all matches in your text. For example, if half of your paper is 100% plagiarized, your score would be 50%

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Get a 100% accurate report from an advanced AI-powered writing assistant. Our plagiarism checker works with all common file formats.

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How to avoid plagiarism?

Proper citation style.

Avoid plagiarism by always listing the source and formatting it correctly when you are note-taking. Take care of the proper formatting and citation style when using content from outside sources.

Write on your own

Avoid borrowing and overusing large pieces of the content from outside sources, especially from Wikipedia. Write your own thoughts and use sources only to support your opinion (remember to cite it though!).

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PapersOwl expert can rewrite up to 75% of your content, edit and proofread your paper to make it plagiarism free and ready to use.

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PapersOwl expert can edit up to 50% of your content, proofread and polish your paper to make it plagiarism free and ready to use.

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PapersOwl expert can rewrite your paper from scratch according to instructions and guidelines and make it plagiarism free and ready to use.

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Plagiarism Checker Review

Get speed and uniqueness when you use the free Papersowl plagiarism checker that accepts an unlimited word count compared to other platforms.

Online Plagiarism Checker For Students

Writing an academic paper can be challenging when you’re not sure if it’s original enough to pass a plagiarism check. Of course, students take information from various sites before writing their own text. Sometimes, it just so happens that certain parts are very similar to your resources, making your professor think that you’ve just copied work from somewhere. That’s why it’s crucial for any modern college or university student to ensure that their work has 100% original content to maintain academic integrity.

Luckily, a free plagiarism checker online can solve this issue quickly and easily. Many professional writing services use a plagiarism checker for research paper. However, students sometimes forget that they should too. But with so many options that pop up when you ask Google to “check my paper for plagiarism”, how do you choose the right one for detection? We’ve got the solution in the form of PapersOwl’s free plagiarism checker tool! Our simple tool makes it convenient to check any writing task without having to spend a dime. It works quickly and highly accurately, ensuring that you get the top grade you deserve. So, if you want to check plagiarism online before turning your task in, head over to our website and get started!

Accurate Check for Plagiarism with Percentage

Many students wishing to produce original content aren’t quite sure how to get an exact percentage of plagiarised text in their work. This percentage is important since many universities have a certain limit of non-unique words you can have in your essay for it to be considered okay. If your plagiarism search doesn’t give you the exact percentage, you can’t be sure if your assignment will go through or not.

When using a free plagiarism tool, it’s essential to have this data provided to you. Only when you have it can you decide which parts to change and which ones to chuck out to achieve your desired results. Plagiarized content is a big issue in modern educational institutions, so getting reliable and trustworthy results is vital. This is the most essential requirement when you check plagiarism.

PapersOwl’s plagiarism detection tool gives you all the information you need to fix plagiarized content. Whether you’ve fallen victim to accidental plagiarism or have tried to make your life easier by copying some text from different sources, you’ll get an accurate percentage with our plagiarism checker online. If you’re wondering how to check paper for plagiarism, it’s nothing complicated at all! Simply visit our site, paste your whole essay into the relevant text box or upload the text file, click on Check For Plagiarism, and you’ll get accurate plagiarism results in a matter of seconds. You’ll see the problematic parts with plagiarism detected highlighted, with links to where similar content exists. Our service with plagiarism detector will also give you the option to check my paper for plagiarism and then to hire a professional writer to fix your task quickly if you’re busy with other things!

The Fastest Plagiarism Checker Online

Gaining insight into duplicate content only works if you get your results quickly. There are so many free plagiarism software online that promise to do the job for you. However, a lot of them are clunky, slow, and inaccurate. How can you produce original work without similarity detection you can trust?

PapersOwl stands out in this regard because it will detect plagiarism in seconds. This is a plagiarism scanner that’s able to perform a Swift Check to give you a uniqueness check right there and then. It also conducts a Deep Search, going through millions of sources on the internet to check for plagiarism. A document of about 1500 words takes only about 10 seconds to get processed! You get a clear plagiarism score of how much text is plagiarized and how much is original. All the sources that your essay matches are listed based on how much similarity there is in your academic writing. And on top of that, you get a handy Make It Unique button that’ll take you to an order page where you can ask our expert writers to rewrite your work and make it 100% unique.

All of this is done almost instantly, allowing students to continue working on their assignments without missing a beat. Not every plagiarism detection software works this quickly, making ours the best one you’ll ever use.

Plagiarism Checker Helps Boost Your Grade

A lot of students make the mistake of considering their papers automatically free from plagiarism. After all, they’ve written it themselves, so how could it be problematic? What they don’t realize is that it’s very easy to borrow some information mistakenly. Turning such a paper in can cause multiple problems, as your professor might think you haven’t done the work at all.

That is why you should always use a plagiarism scanner to test for plagiarized content in your college papers. Our online plagiarism checker for students is designed for this exact purpose. A simple, free plagiarism check could help you check plagiarism, fix any mistakes you see, and submit high-quality text that no one will question.

Our plagiarism detector has a lot going for it. It makes plagiarism detection easier than ever before. Unlike copying and pasting each passage individually into Google, simply upload the whole file into our plagiarism checker free for students, and you don’t have to do anything else. All the matches are highlighted so you know what to change.

The plagiarism test will give you a uniqueness percentage too. This will help you figure out where you stand and how much time you need to adjust anything if required. So, using our copyright checker online free to check your writing is essential. This way, you’ll submit the task only when you’re sure it meets the level of uniqueness required by your school. As a result, your grades will drastically improve when you check for plagiarism.

Benefits of Free Plagiarism Checker for Students

Our professional online plagiarism checker work offers too many benefits to ignore. With our plagiarism detector, you can enjoy highly accurate results as a comprehensive report. The plagiarism checker for students is designed to help you achieve 100% uniqueness without hassle. Here are the key advantages you can enjoy when you check plagiarism free with our plagiarism detection tool:

It’s completely free! We know you are on a tight budget and should be able to check your paper for plagiarism without worrying about payments, so we’ve made the best similarity checker free for all!

Our software detects plagiarism swiftly. It’ll show you detailed results in as little as 10 seconds so you can continue working immediately.

The report from our plagiarism tool gives you access to all the links from where it has detected similarities in your work. You can head to the relevant sites and see which information you must rewrite to improve your results.

Our best free plagiarism checker doesn’t require any skills and presents its services in a simple-to-use interface that anyone can use.

The plagiarism test allows you to get professional help with your work if you’re short on time. Simply ask one of our writers to rewrite the problematic parts of your text and enjoy top grades.

With PapersOwl plagiarism detector, there’s no need to search the internet for an accurate tool. We have many satisfied students worldwide who can vouch for our plagiarism-checking services. Give our online plagiarism checker free tries as often as you want and see how easy it is to produce original essays without spending a penny!

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How Does Plagiarism Checker Work?

  • If you already have a completed text, all you need is just to copy-paste the whole thing in the special box of the chosen plagiarism tool or website, choose suitable settings (if any), then press “check for plagiarism”. It is quite simple and takes just a few moments.
  • Once you have pressed “check for plagiarism”, the system will analyze your text and compare it with different sources to find similarities. As a rule, the duration depends on the text’s length. A standard free online plagiarism checker with percentage can give you the result within five minutes or less.
  • When the system finishes the work you will be transmitted to the reporting page – it contains the comprehensive report on your work, a percentage of its uniqueness, and a list of sources on which similarities were detected. Often, such tools also highlight the overlaps that were found.

As you can see, it is simple. However, for the best and reliable result you have to be careful. There are tons of programs and online tools that can be used but keep in mind that many of them work differently and not all are good for you. To be confident in the truthfulness of the received result, you need to select the best plagiarism checker because only a professional and high-quality software can detect all similarities and give you a reasoned assessment.

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Advantages Of Plagiarism Checker By PapersOwl

Why choose us? Our service offers a professional online plagiarism checker with report that will provide you with a comprehensive report to make you confident in the 100% uniqueness of your paper. Our free plagiarism checker for students guarantees the best check and here are the key advantages of using our tool that prove this:

You don’t need to pay anything to check your paper for plagiarism because we know the value of original and unique works.

One of the main benefits of our antiplagiat checker online is that it works so fast that you will not even have enough time to make yourself a cup of coffee while it analyzes your text, and it is safe!

We use the latest and the best algorithms and software in order to provide you with an advanced check and help you receive the high-quality papers.

It is simple in use and won’t take much time!

Many students have already confirmed that our free tool is a great and convenient feature that helped them detect and fix errors that could lead to a failure. With us, you will no longer need to look for a different scanner!

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Plagiarism Checker FAQ

Can i check my essay for plagiarism free online, can i use papersowl plagiarism checker as a student for free, can i check my research paper for plagiarism for free, will the papersowl plagiarism report be the same as at my university, what are the consequences of plagiarism, why wait place an order right now.

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Plagiarism Checker by Quetext

Free plagiarism checker: how it works, enter text into plagiarism detection tool.

We make it simple. Just copy and paste all content from your document into our plagiarism checker and hit the ‘Check Plagiarism’ button to get started.


Evaluate text for plagiarism

Our plagiarism detection tool uses DeepSearch™ Technology to identify any content throughout your document that might be plagiarized. We identify plagiarized content by running the text through three steps:

  • 1.) Contextual Analysis
  • 2.) Fuzzy Matching
  • 3.) Conditional Scoring

Accurate plagiarism results

After evaluating the text against billions of internet sources, you will be provided with a plagiarism score showing the percentage of text that is an exact or near-match to existing text online.


Resolve plagiarism risk and use citations

Our ColorGrade™ feedback feature highlights exact matches vs. near-exact or “fuzzy” matches with corresponding colors. From there, you can resolve plagiarism issues by deleting or altering the at-risk copy. Or, you can use our handy “Cite Source” feature to generate citations in MLA, APA, and Chicago formats and insert the citations directly into your document.

Plagiarism Checker Benefits

Whether producing original content or verifying that of others, there’s a lot to gain from using a plagiarism checker. Accurate, automatic detection of duplicate content facilitates the copy-checking process for teachers, students, content writers, and more. Results showing the exact percentage of plagiarized content allows users to see exactly how much text has been copied and where they need to re-word.


For Teachers

Before homework can be graded for quality, it must first be confirmed as original. Our easy-to-use tool arms teachers with a simple, effective way to verify and grade students’ work. Educators at all levels can benefit from ensuring academic integrity through a comprehensive plagiarism check. From K-12, all the way through higher education, teachers are faced with the task of verifying the originality of the work of dozens, if not hundreds, of students each year. Automating this process frees teachers up to focus on the quality of work, rather than be bogged down by its originality.


For Students

While the prevalence of academic plagiarism is on the rise, much of it is arguably unintentional. A simple, yet accurate and comprehensive, plagiarism checker offers students peace of mind when submitting written content for grading. It is much easier to do a quick check for potential plagiarism before submission rather than convince a teacher after the fact that your academic integrity is not in question. And Quetext even takes checking for plagiarism a step further, helping students identify and cite the source itself with our built-in citation generator.


For Copywriters

Plagiarism risk is not restricted to academia. Anyone tasked with writing for an individual or business has an ethical and legal responsibility to produce original content. On top of that, content writers are often tasked with producing content on topics outside of their wheelhouse, leaving them reliant on the work of others for their research. Our plagiarism checker gives content writers a quick and easy method to prevent copyright infringement. Checking even lengthy pieces of writing takes only a few minutes, keeping companies’ public content in check and writers’ integrity intact.

Types of Plagiarism

It’s important to understand that plagiarism expands far beyond just copying someone else’s work word-for-word. There are several different types of plagiarism that should be avoided.

Self Plagiarism


Many believe that, as long as they produced the work at some point in the past, they can include it in future pieces. However, even if you were the original author, that original work must be cited in order to not be flagged as plagiarism. Treat your past self as a totally separate author; be sure to include all relevant citations and quotations, the same as you would for any other source.

Patchwork Plagiarism

Patchwork Plagiarism

Patchwork plagiarism is the act of piecing together a "patchwork" of existing content to form something new. Assembling unoriginal content in this manner often involves some paraphrasing, with only slight changes. This type of plagiarism can be tricky and can certainly occur unintentionally, especially in academia. Since academic writing is largely based on the research of others, a well-meaning student can inadvertently end up plagiarizing.

Mosaic Plagiarism

Mosaic Plagiarism

Mosaic plagiarism is synonymous with patchwork plagiarism. It describes the process of loosely rearranging or restating another's work without issuing proper credit. It can occur accidentally or intentionally. For authors, mosaic plagiarism endangers their academic integrity or reputation as a writer. For those checking content originality, such as teachers, mosaic plagiarism can easily appear to be original content, which can make mosaic plagiarism especially difficult to detect manually.


Accidental Plagiarism

Plagiarism doesn’t have to be intentional to still be considered plagiarism — even in early academia, where students are just learning how to properly cite others’ work. While there may be no ill intent from the student, most schools have policies explicitly treating accidental plagiarism the same as intentional plagiarism. Students are expected to know how to properly issue credit to other authors. Similarly, content writers risk damage to their reputation if they produce plagiarized content, regardless of intent.

Plagiarism Checker FAQ

What is plagiarism.

Plagiarism is representing someone else’s work as your own. In educational contexts, there are differing definitions of plagiarism depending on the institution. Plagiarism is considered a violation of academic integrity and a breach of journalistic ethics.

What percentage of a paper can be plagiarized (or copied) and still be considered unique?

Generally speaking, similar or exact copies of another source should be kept under 15% for the total text of the article/paper/essay. As a best practice, citations should be used whenever using another source word-for-word.

What’s the difference between deliberate and accidental plagiarism?

Deliberate plagiarism is purposely copying works from books, articles, webpages, or someone else’s paper and representing it as your original work. Alternatively, accidental plagiarism occurs in a few different ways:

  • Incorrectly citing another person’s works
  • Failing to paraphrase another person’s works - even when citing it correctly
  • Reusing your own previous papers and inadvertently representing it as a new idea

What are the consequences of plagiarism?

The consequences for plagiarizing another person’s works vary. But broadly speaking, the types of consequences can be grouped by person and profession.

Plagiarism consequences for students

Maintaining academic integrity is a top priority for every educational institution. As already mentioned, ignorance of how to properly cite sources is not an excuse for plagiarism. It is the student’s responsibility to ensure they are submitting work that has not been plagiarized.

Failure to do so can result in disciplinary action, including an automatic failed grade, removal from a class, or expulsion from a school or university. Students who are allowed to continue at their institution following an act of plagiarism may encounter mistrust and additional scrutiny from teachers and instructors.

Plagiarism consequences for copywriters

Copywriters stake their reputation (and by extension, that of their client or company) on their writing. All copywriters must produce completely original content for their clients.

The consequences for plagiarism here are clear: Copywriters who plagiarize the content of others will quickly find it difficult to obtain paying assignments. Similar to academic situations, it is the copywriter’s own responsibility to ensure that their content is 100% original.

Plagiarism consequences for journalists

Journalists are held to exceptionally high standards of integrity in their writing. A journalist who produces plagiarized content jeopardizes the trust of their readers and publishers. Plagiarism can instantly reduce a journalist’s career by a large margin. The ethical and legal standards issued to journalists are clear: Produce original, well-cited content or find another field.

Trusted Online Plagiarism Checker For Students and Academics

plagiarism essay checker

How to Use the Paperpal Plagiarism Checker to Write Responsibly

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Paperpal Offers More Than An Online Plagiarism Checker

Paperpal Prime provides comprehensive language correction, paraphrasing, and generative AI writing capabilities to transform your academic writing.

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Access our suite of secure generative AI features designed to help you overcome writer’s block and deliver high-quality, original content, every time.

Frequently Asked Questions: Paperpal’s Plagiarism Checker

How can i access paperpal’s plagiarism check, how many pages or words can i check per month, will my unused quota transfer to the next month, what software is being used to detect similarity, what database is my writing checked against, how do i interpret the similarity score, why did i get a high similarity score after polishing language with paperpal using copilot’s ai-generated text, can paperpal ensure that my content is not flagged by plagiarism or ai detection tools, my paper is completely original. why is my similarity score so high, what types of documents can i upload, are my documents stored and added to turnitin’s database, understand plagiarism and ethical writing.

Want to master the basics of plagiarism and learn how to use AI tools responsibly? Check out these curated articles on plagiarism and ethical academic writing guidelines!

plagiarism essay checker

Self-plagiarism in research: What it is and how to avoid it

Self-plagiarism in research should be strictly avoided. Yet, it’s quite common to find early career researchers, and sometimes even experienced scholars...

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The Do’s & Don’ts of Using Generative AI Tools Ethically in Academia

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Addressing Your Queries on AI Ethics, Plagiarism, and AI Detection

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All-in-One grammar and plagiarism checker

The only thing harder than writing a paper is editing it. Nobody’s perfect, and grammatical errors are all too easy to make. But a grammar checker could help! That’s where Citation Machine Plus comes in: a one-stop shop that pairs a top-notch plagiarism checker with a complete grammar check. It’s the perfect companion for any student. Whether you’re an expert writer who just needs a second look or could use a full-fledged crash course on brushing up your writing, we’ve got it covered.

We offer smart technology you can access day or night, for all your last-minute deadlines. Citation Machine Plus’s built-in tools can help ensure you didn’t accidentally use someone else’s words without referencing them. If it does find an issue, you can use its citing tools to quickly create a citation for it.

To power up your paper even more, our tools offer an easy spelling check and the best grammar checker we’ve ever built. Our powerful software will run a quick grammar check and spell check to catch big and little mistakes on your paper.

We think Citation Machine Plus is the best grammar checker for a fast grammar analysis and spell check to catch things you may have missed! Whether it’s an issue with subject-verb agreement, a fragmented sentence, a dangling modifier, incorrect usage of an interjection or adverb , or just a grievously misused comma, our software hunts down and points out those easy-to-correct mistakes. Plus, our program includes a reliable spell checker to help catch and correct any typos.

The only question is: What are you waiting for?

Try Citation Machine Plus and get a free grammar check for your paper, scan your paper for text that may need a citation, and rest easier knowing your paper’s had an extra review before your teacher sees it.

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Plagiarism matters more than you think

You might define plagiarism as copying someone else’s work , whether by copying another student’s paper or taking passages directly from research sources and passing them off as your own work. But did you know that it’s not just about literal copying, but about making sure you credit your sources.

Think about it: would you want someone to take your hard work without crediting you? Of course not! So it’s important to make sure that you don’t accidentally use the work and research of someone else without giving them the credit they deserve and that formatting requires. A plagiarism check provides you with peace of mind that you haven’t forgotten to cite sources.

plagiarism essay checker

A paper check for peace of mind

Plagiarizing the works of another writer is a big deal in school and in life. Even if it’s a mistake, it’s the sort of mistake that no one wants to make because it’s a pretty serious issue. Luckily, it’s pretty easy to avoid if you have the right tools at your disposal! The first step to avoiding it is knowing what it is.

One plagiarism definition — probably the most commonly discussed one — is to directly steal somebody else’s words and pretend they are yours, or, alternately, to use someone else’s words and not give them credit. These actions are deliberate attempts to deceive, and they do happen in real life. More often, however, issues arise from not from intentional misconduct, but from innocent or careless mistakes that simply give an impression of copying because sources haven’t been credited as they should.

Most teachers ask you to cite the works of others so you learn to be an ethical researcher who does not plagiarize . In many cases, teachers will use a plagiarism tool to make sure students are following guidelines. However, with so many assignments, chores, friends, and other parts of life going on, it can be difficult to keep track of everything.

That’s why getting a plagiarism check — like the one from Citation Machine — can save you from forgetting to cite sources. It’s simple to use, catching missed citations and other errors. Finding and correcting these problems before you turn in your paper can make the difference between a stellar grade and a failing one.

Still not sure about it? Try our essay checker with Citation Machine Plus for free. Simply copy and paste or upload a paper into our tool and immediately get a grammar check!

Snag an intelligent paper check

Personalized writing suggestions at your fingertips? Yes, the dream is real, and it’s right here at your fingertips, thanks to the easy-to-use Citation Machine Plus paper checker. But that’s far from the only thing it can help you with.

Why wear out your own tired eyes after you’ve already researched, written, and proofread that long essay or term paper? Even the most attentive student might miss a minor detail or in-text citation when reviewing their own paper. Instead, use our software to check your paper and catch missed citations or accidentally copied passages of text before you turn it in. With Citation Machine Plus, a smart plagiarism check is only a few clicks away, allowing you to catch missed citations or accidentally copied text.

So why not try it out? It’s free to scan a paper and can help catch those pesky errors hiding in your text, even if it’s as simple as a quick fix of a  pronoun or a missing preposition . And with an affordable subscription plan, you can upgrade and unlock all of our powerful writing and citing tools.

How a plagiarism check helps you

We often think of citing sources to avoid plagiarizing as something that helps other people, because it’s focused on correctly crediting the work done by others and not passing it off as your own or accidentally implying that it’s your own by failing to cite sources. But using a plagiarism checker to do this actually benefits you, the student, too!

When you submit your paper to be double-checked and to make sure that you haven’t plagiarized in any way, you’re also protecting yourself. How does that work? It’s all based on the way these tools function in the first place. Most of them are built around algorithms that compare uploaded papers to a vast database of existing work. This may include research databases of published works (think papers in academic journals, books, newspapers, and other print and digital sources), as well as information found online on websites.

So when you submit to a free plagiarism checker — or a subscription-based one — you’re comparing your own writing to other writings online. Your essay is checked using algorithms. How does this help you? In short, it protects you from accidentally getting a reputation as a plagiarist. Once you’ve uploaded a paper, the checker will scan your writing to make sure that your writing is wholly your own, saving you plenty of headaches and ensuring that your original ideas are shining through clearly with support from sources, rather than borrowing too heavily from other research.

If that’s not reason enough to use a checker, then remember this: if you’re in any sort of formal writing class, whether in high school or in college, your teacher is very likely to have access to a checker through their department. “Check paper for plagiarism” is at the top of the to-do list when teachers sit down to grade papers — in fact, many have a rubric that has a section for academic honesty and proper citations.

Since your teachers are already using this kind of software, wouldn’t it be great if you could too? The great news is you can! A Citation Machine Plus subscription gives you access to a set of tools built specifically for students, allowing you to check your paper on your own, before even submitting your work for grading. The more you check on your own, the more you learn, which can help you avoid making mistakes in the future.

But that’s not all.

So, what is plagiarism?

Let’s start with the basics. You might be surprised about what really counts in the overall plagiarism definition. For instance, have you ever heard of incremental plagiarism? Also called “patchwork,”  this happens when you take bits and pieces from multiple sources, without citing, and pass it off as your own work. This is common with specific turns of phrase or ideas, but it’s also what can happen if you aren’t careful with citing all sources. A paper-checking service can help catch these issues before they get to your teacher’s desk.

When we talk about plagiarism, we’re talking about a wide variety of issues. It can mean deliberately copying from another source, whether it’s a book, an academic paper, or the work of a classmate or previous student. Using services that do work on behalf of a student, then put the student’s name on it, also falls into this category. As described above, deliberate incremental plagiarism — usually plagiarizing multiple sources and combining them to avoid detection — is also a major problem.

The above examples are probably the first answers that come to mind in response to the question “what is plagiarism?”, but there’s actually a lot more to it than that. Most of us wouldn’t intentionally plagiarize, but there are plenty of instances where you might do so without even realizing that you’ve done something wrong!

For instance, forgetting to cite a quoted source might result in the quoted passage tripping the algorithms when your teacher runs it through a paper checker. Or perhaps you’ve synthesized the information from your research, but you’ve inadvertently reused some particularly distinctive language from one of the original sources, making it appear like intentionally copied text even though it’s really not. Citation Machine Plus tools can help you avoid these accidents by proofreading your paper to catch any instances that could count against you and helping you fix the issues.

Here’s a detailed article if you’d like to learn more about avoiding plagiarism .

Why we cite

What do teachers want to see in your papers? When it comes to writing style, teachers will pretty much always understand that every student will have a different voice, but they’ll still be looking for certain elements that every paper should have — like citations. Essentially, the idea is to make sure that an essay has original ideas and arguments and cites sources where it uses existing information .

Remember the Golden Rule? Do unto others as they would do unto you? Most of us would not want others to take credit for our ideas, so we don’t intentionally steal someone else’s words. But with so much information in the world, it can easily occur by accident.

Unfortunately, it happens both intentionally and unintentionally enough that teachers often take student work and run it through a scan to make sure the content is original. That’s right, even teachers sometimes use online tools from a subscription-based or free plagiarism checker. It’s even a required step for many writing classes at any level, so make sure that your paper is prepared for these kinds of checks.

That being said, no teacher really wants to flag any student’s paper, and no student wants to be flagged. That’s one reason citations are so important and a vital part of ethical research and writing. When you cite your sources correctly, you’re giving credit to the originators of the ideas or quotes, which means that there’s no plagiarizing going on — just good old-fashioned research .

When you first start learning to cite your sources, you probably learned just one overall style guide. In college and in the real world, though, the style guide you’ll need to use will depend on what field you’re in. For instance, academia often sticks with Chicago citation style , while the arts and humanities tend to prefer MLA, and APA is favored by the social and behavioral sciences.

So you need MLA format help? We got you covered! How about APA format instead? No problem! We’re all over that, too! In fact, we have many more citation styles . Our classic citation tools are available for all your formatting needs.

Here’s the best part: using our tools could help you expand your knowledge for the future! Our citation formatting tools can help you become more familiar with the most popular style guides — which will make your life easier when you go to write more essays in the future! Curious about these benefits and how it works? Here’s a great place to

Citation Machine Plus: More than a plagiarism tool

Citation Machine Plus is much, much more than just a way to check plagiarism — you can scan for grammar errors, too!

Unsure if you could benefit from a Citation Machine Plus subscription? Submit your paper for a grammar and spell check with up to 5 suggestion cards for free. A simple copy and paste or paper upload, a few clicks, and it’ll start reviewing your paper. Is an adjective used incorrectly? Is a determiner in the wrong spot?

That’s where the all-in-one Citation Machine grammar checker and spell checker comes in! With this simple but powerful software, writing can be scanned for grammar mistakes. Some of the most common errors are actually some of the simplest to fix. Even better: as you learn, you’ll make fewer and fewer of them.

The tool will highlight any errors, plus more! In fact, the tool can sometimes even tell you why your mistakes are mistakes and help you correct them. That’s why we think our grammar check is the perfect helper for your papers: it doesn’t just help to catch your errors, it also helps you learn from them so that you can improve your writing over time.

Hypothetical situation (or is it?): You have just finished writing a paper for class. Maybe you spent hours writing it, maybe you only spent an hour on it. Either way, wouldn’t you feel better turning in your paper if it was proofread and reviewed?

Everybody wants an A+. The only way to get there is through practice, hard work, and learning. Citation Machine Plus writing tools can help you develop your skills by identifying potential errors in your paper. That way you can improve your paper and learn what grammatical points to focus on in the future.

Help with formatting

As it’s more than just an essay checker, the Citation Machine Plus suite of tools has a few more tricks up its sleeve! As the name implies, these tools are built for equipping you with simple, easy-to-use citation tools to help you build a bibliography for your paper.

Citation Machine Plus: Your go-to writing source

So now’s the time to stop stressing over writing errors, accidentally plagiarizing others, and citation concerns. Let Citation Machine Plus help you write well! It’s the writing companion that can help to take your academic writing to the next level, and it will give you tools you need to become a better  writer both in and out of academic contexts.

Turning in essays for class can be stressful enough on its own, but that stress can just get compounded with worries about grammar and citations. There’s no need to stress when Citation Machine Plus is at your disposal! Its tools are easy to use, all-in-one platform that helps take the worry out of writing a paper when it comes to grammar and citations. Check for everything you need, all in one place, and learn more about how to make your writing truly shine.

Whether you need a quick check of your conjunction , noun , or verb usage, a complete grammar check, a thorough plagiarism tool, or reliable help citing sources, invest in a subscription to what we believe to be one of the most user-friendly citation tools online—Citation Machine Plus!

Easy citation creation

Let’s be honest, citations are a hassle. But the great thing about a paid or free online plagiarism checker is that you can pull double duty: when you check for plagiarism, you’re also checking to see if you’ve left out any citations! We wanted students and authors to have a one-stop shop when it comes to citing; a citation creation tool at your beck and call.

And now you do!

In addition to our paper checking tools, we have citation tools! Citing sources not only makes your work more professional, it is generally required for any formal papers or research projects. Any time you use the words or direct concepts of others, it’s vital to give credit where it’s due, and a proper citation is the means to do that. Remember: when we ask “what is plagiarism?” the answer includes improperly cited sources along with intentional copying! Teachers can often use a paper-checking service through their schools, so we’ve developed similar tools for students to use.

Our classic citation tools make it easy to create a correctly-formatted citation for APA format or MLA format citation styles. ** We have taken the hassle out of citing your sources, and — trust us — you will notice the difference.

** The APA and MLA are not associated with Citation Machine, but our citation services follow their styles.

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  • Knowledge Base

Best Plagiarism Checkers of 2023 Compared

Published on June 7, 2023 by Koen Driessen .

The best plagiarism checker should be able to detect plagiarism the most accurately, even if the original phrasing has been altered. The tool should also provide a clear, comprehensive plagiarism report.

To identify which plagiarism checker is best, we conducted in-depth research comparing the performance of 10 checkers. We uploaded plagiarized texts that were either directly copied and pasted or edited to varying degrees. In total, we used 140 sources to construct our test documents.

Overview of total scores per plagiarism checker, based on the amount of detected plagiarism:

Table of contents

Our process for comparing checkers, 1. scribbr review , 2. plagaware review, 3. quetext review, 4. viper review, 5. grammarly review, 6. plagiarism detector review, 7. copyleaks review, 8. smodin review, 9. compilatio review, 10. writer review, frequently asked questions about plagiarism checkers.

In order to find the best plagiarism checker, we analyzed different aspects of the tools, focusing on both depth and breadth.

We based our analysis on the following factors:

  • Access to the biggest and most varied database
  • Ability to detect the most plagiarism for the most source types
  • Ability to detect plagiarism when the plagiarized texts have been paraphrased
  • Highest quality of matches
  • Level of user-friendliness and trustworthiness

We used the same test documents, test date (April/May 2023), evaluation criteria, and data analysis for each tool in order to objectively compare the plagiarism results side by side. This ensured that the results required very little interpretation on our part.

Also see our list of the best free plagiarism checkers and the best AI detectors .

“Catches plagiarism more accurately than any other checker”

Scribbr Plagiarism Checker

  • Finds the most plagiarism and works for edited texts, too
  • Does not store or sell documents
  • Offers a happiness guarantee and live support
  • Offers a Self-Plagiarism Checker to check for self-plagiarism
  • Offers a limited free version
  • Quality comes at a price
  • Cannot work directly in the tool

Quality of matches

Scribbr performed well for all source types relevant to students, such as journal articles and dissertations.

Most importantly, Scribbr’s checker was the most successful at detecting plagiarism in source texts that had been heavily edited to mimic accidental paraphrasing plagiarism.

Scribbr was also able to find full matches. This means the entire plagiarized portion is matched correctly to just one source, rather than multiple incorrect sources.

The results are presented in a clear, downloadable overview. Different colors are used for different sources, making it easy for users to assess each plagiarism issue separately.

Issues can be fixed with Scribbr’s free citation generator , which generates proper citations for any missed or improperly cited sources.

Users can also choose to combine the Plagiarism Checker with the Self-Plagiarism Checker , which is unique to Scribbr. This tool allows users to upload their own unpublished documents in addition to the public database.

Instead of requiring users to subscribe to their services, Scribbr charges per plagiarism check ($19.95–$39.95, depending on the word count).

However, users are unable to work directly in the tool, and it is not possible to re-check your document for free.


Scribbr does not store the uploaded documents, sell them to third parties, or share them with academic institutions. Data is automatically deleted after 30 days, or students can opt to manually delete their document after the check.

Scribbr has live and responsive customer support to assist students in multiple languages. There is easy access to a plagiarism checker guide and other free resources about plagiarism.

Scribbr also has a happiness guarantee, where students receive a new check or refund if they aren’t satisfied for any reason.

Try Scribbr’s Plagiarism Checker now


  • Detects most of the plagiarism
  • Documents not stored in database
  • Multiple support options, but no live support
  • Difficult to read PDF reports
  • Does not work well for scholarly sources

Plagaware was often able to find full matches and attribute the text to the correct source. However, it performed poorly with heavily edited texts.

Sometimes, the tool did not correctly distinguish between separate plagiarized sources (i.e., it incorrectly attributed two consecutive paragraphs to the same source).

The website report is easy to navigate as it uses different colors for sources. The tool has a function that tells you how many words a plagiarized section has and gives a similarity percentage.

Unfortunately, the downloadable report is confusing to read as it uses only one color and doesn’t clearly link plagiarized text with a source.

Plagaware does not store files and does not sell uploaded content. Their website contains a contact form and phone number.

Discover Plagaware’s plagiarism checker


  • Users can work directly in the tool
  • Offers a citation assistant that helps with adding missing citations
  • Partial matches where one source text is matched to multiple sources
  • Reports are hard to read

Quetext detected about half the plagiarized text but was often unable to fully match the entire source text to one source. Instead, individual sentences get attributed to different sources.

The website states that Quetext checks against webpages and academic sources, but the tool does not in fact perform well for academic sources.

The website report sometimes did not correctly distinguish between plagiarized paragraphs and attributed them to the same source.

Quetext differentiates by severity of plagiarism in its online report: orange for partial matches and red for full matches. Otherwise, the same colors are used for different sources.

Users can work directly in the tool, and Quetext offers a citation assistant that helps generate the missing citations.

The original layout of the text is lost in both the website report and the downloadable report.

The tool does not store or re-upload your text, and it offers a help center with FAQs. There is no live support, but users can submit a help request on the website.

Discover Quetext’s plagiarism checker

Viper Plagiarism Checker

  • Ability to compare your newest document with previously uploaded documents
  • Different colors for different source types
  • Documents get published on external websites if you use the free version
  • Performs poorly for scholarly sources
  • Report can be hard to read, due to partial matches

Viper found about half of the plagiarism when the source text was directly copied or lightly edited, but it struggled to find plagiarism in moderately and heavily edited texts.

The tool had average performance for most source types but struggled specifically with scholarly source types such as journal articles and dissertations. This makes this tool less useful for students.

When Viper flagged plagiarism, it often matched the entire passage to one source. While the downloadable report was somewhat difficult to read, it helpfully uses different colors for different sources.

Viper also allows users to check their text against their own previously uploaded documents, which may help to catch instances of self-plagiarism.

Viper stores previous submissions and shows matches with those texts.

The tool does not sell your document if you use the paid version (prices start at $3.95 per 5,000 words). However, if you use the free version, the document is uploaded to an internal database. After three months, the text is published on an external website as an example for other students. This is not good if the content of your text is confidential.

Viper does not have live support, but there is a contact form on the website.

Discover Viper’s plagiarism checker


  • Offers a language and citation assistant
  • Does not sell or share documents with other parties
  • Finds quite a low percentage of plagiarism
  • 100,000 character limit (14,000–25,000 words)
  • Same colors for different sources

Grammarly found a relatively low amount of plagiarism. It performed best with lightly edited texts. However, it scored below 50% in all other rounds of testing.

When it did find plagiarism, the tool was often able to find the right source. However, the matches were usually only partial and rarely included the entire plagiarized section.

The design is not very clear. As the tool is primarily used as a language checker, the plagiarism checker function is somewhat difficult to find. The tool uses the same color for all sources, making it hard to read.

The subscription comes with a language and style tool and offers a citation assistant that helps generate the missing citations. In addition, there is a 100,000 character limit for both the monthly plan ($30 per month) and the yearly plan ($12 per month).

Grammarly does not store, sell, or share documents with other parties.

There is a support page with tips, tutorials, and FAQs, and it is possible to submit a question via a form. However, there is no live support.

Discover Grammarly’s plagiarism checker

Plagiarism detector

  • Does not store or sell your document
  • Difficult to find the plagiarized source in the report
  • Same highlight colors for different sources
  • Technical difficulties generating the report, and no live support

This tool had difficulty uploading the document for each round of testing (for the first round, it took over six hours to generate a report). It seems that Plagiarism Detector was unable to adequately process a document of this size, even though the document did not exceed their word limit of 25,000.

This tool was mostly only able to find partial matches, attributing individual sentences to one or more sources, rather than the entire section.

In the downloadable report, the format of the text is lost, making it hard to read. The list of sources is also difficult to cross-reference with the text above because the same colors are used for different sources.

Plagiarism Detector offers a rewrite tool to help resolve similarities, but the quality of this tool is questionable, and it does not help with the citation issues. You should resolve plagiarism by citing the relevant source, not by attempting to rewrite the text to disguise it.

Plagiarism Detector does not store or sell uploaded documents. There is no live support, but the website does offer a help request form.

Discover Plagiarism Detector’s plagiarism checker


  • Text layout is kept intact in the online tool
  • Difficult to read reports
  • Performed poorly with academic sources
  • Unclear data protection policy

Copyleaks performed relatively poorly with all source types. It lists multiple possible sources for flagged sentences. However, it was sometimes able to attribute an entire source block to the correct source.

The report distinguishes between text that is “identical” to a source, text that contains “minor changes,” and text that is “paraphrased.” However, its judgment is sometimes wrong.

The site report and downloadable report differed (the downloaded report flagged content that was not flagged on the site report). On the website report, the source information function did not always work correctly, so it was sometimes impossible to check the accuracy of the attributions.

The reports were also difficult to read, as they use the same color highlights for all sources. While the source formatting is maintained in the online tool, it is altered in the downloadable report.

Copyleaks claim that they “will never steal your work.” To permanently remove uploaded content from their database, users must contact customer support. The website has a chat option and a contact form.

Discover Copyleaks’ plagiarism checker


  • Site has a citation generator
  • Very low word limit
  • Report is difficult to read
  • Scans individual sentences rather than full texts

Smodin performed relatively poorly in all rounds of testing. While it got some sources correct, it struggled to get full matches and frequently attributed the same text to multiple different sources. It did particularly poorly with scholarly sources.

The tool has a very low limit of 2,000 words per scan.

Both the online report and the downloadable PDF report are difficult to read. The downloadable report displays the uploaded document, but it doesn’t highlight the text that it flags as plagiarized. Instead, below this, it includes the individual parts of the text that it recognizes as plagiarism.

However, it is difficult to read as the same text is repeated over and over again if multiple sources were found for it. The sources also do not seem to be in a logical order.

Their data protection policy suggests they can/might sell or repurpose uploaded content. There is no live support, but there is a contact form on the site.

Discover Smodin’s plagiarism checker


  • You can use your credits for multiple documents
  • Scans against other documents you have uploaded
  • Doesn’t highlight the plagiarized parts in the text
  • Hard to review and resolve instances of plagiarism

Compilatio was able to find a few of the plagiarized sources, but it struggled if the source text had been moderately or heavily edited. However, when it was able to identify a source, it was often correct.

It was not possible to determine how accurately Compilatio could match the source to a plagiarized source text, since the plagiarized parts were not highlighted. Instead, the report only shows the general area that matches the source. This may limit its helpfulness to users, since it’s hard to review and resolve potential instances of plagiarism.

As the report does not highlight the flagged text, it does not provide a good overview of the potential issues. Additionally, you cannot work in the tool, so it’s not possible to exclude similarities from the report.

The tool scans the text against other documents you have uploaded, which can help to avoid self-plagiarism.

Users can buy packages for 5,000 words for €3.99 (no $ value is available on the site), 25,000 words for €14.99, or 50,000 words for €24.99. These credits can be used for multiple documents and are valid for 12 months after purchase.

Compilatio does not share or sell submitted documents, and the documents are not used as comparison material for other users.

There is no live support available, but they do provide a helpdesk with FAQs and a request form.

Discover Compilatio’s plagiarism checker

Writer plagiarism checker

  • Part of a tool with many other useful functions
  • Allows you to edit in the tool
  • Text format is not altered
  • Doesn’t find much plagiarism
  • Doesn’t provide a downloadable report

Quality of matches 

This tool found very little plagiarism. It struggled particularly with scholarly sources like dissertations and academic journals.

It scans sentence by sentence, rather than whole paragraphs. As a result, the plagiarized text is often attributed to multiple sources, rather than just one.

The plagiarism checker function is part of a larger language tool that provides grammar and spelling checks. As the tool doesn’t display an overall plagiarism percentage, we couldn’t apply our normal testing methodology. 

The tool has a nice, clean design and was relatively easy to use. The format of the text remains intact, and you can work directly in the tool. However, it doesn’t provide a downloadable report, so you must work solely on the website.

Writer claims that its tool is secure and safe to use and that it won’t share your information with anybody. A detailed security policy is described on a separate page.

They provide a contact number and email address on the site, but no live support.

Discover Writer’s plagiarism checker

Go back to the best plagiarism checker

Plagiarism can be detected by your professor or readers if the tone, formatting, or style of your text is different in different parts of your paper, or if they’re familiar with the plagiarized source.

Many universities also use plagiarism detection software like Turnitin’s, which compares your text to a large database of other sources, flagging any similarities that come up.

It can be easier than you think to commit plagiarism by accident. Consider using a plagiarism checker prior to submitting your paper to ensure you haven’t missed any citations.

The accuracy depends on the plagiarism checker you use. Per our in-depth research , Scribbr is the most accurate plagiarism checker. Many free plagiarism checkers fail to detect all plagiarism or falsely flag text as plagiarism.

Plagiarism checkers work by using advanced database software to scan for matches between your text and existing texts. Their accuracy is determined by two factors: the algorithm (which recognizes the plagiarism) and the size of the database (with which your document is compared).

Yes, Scribbr offers a limited free version of its plagiarism checker in partnership with Turnitin. It uses Turnitin’s industry-leading plagiarism detection technology and has access to most content databases.

Run a free plagiarism check

If you’re a university representative, you can contact the sales department of Turnitin .

Scribbr is an authorized Turnitin partner

Your document will be compared to the world’s largest and fastest-growing content database , containing over:

  • 99.3 billion current and historical webpages.
  • 8 million publications from more than 1,700 publishers such as Springer, IEEE, Elsevier, Wiley-Blackwell, and Taylor & Francis.

Note: Scribbr does not have access to Turnitin’s global database with student papers. Only your university can add and compare submissions to this database.

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Driessen, K. (2023, June 07). Best Plagiarism Checkers of 2023 Compared. Scribbr. Retrieved February 15, 2024, from

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