Most advanced technology

Our software only highlights the similarities that are most likely plagiarism. Commonly used words and phrases along with your reference list are ignored.

World-class content database

In partnership with Turnitin, the Scribbr Plagiarism Checker compares your document to over 91 billion live and archive web pages and millions of publications.


Safe and confidential

We never add your paper to our database. After the check, you can delete your document right away. Your document stays yours.

Detect all types of plagiarism

Like many other plagiarism checkers, the Scribbr Plagiarism Checker identifies sentences that are exactly the same as in the original source.

However, it also detects plagiarism in paragraphs where the sentence structure is changed, synonyms are used, extra words are inserted or text from multiple sources is combined.

Plagiarism comparison

Best plagiarism checker

Compared to other well-known plagiarism checkers, the Scribbr Plagiarism Checker is more accurate.

Why? Our extensive content database combined with the most advanced plagiarism detection technology available provides the most accurate text similarity solution.

Used by over 100,000 students

Thousands of students have used the Scribbr Plagiarism Checker to detect, understand and correct plagiarism.

“Definitely worth the money! Where other plagiarism checkers only detected 5%, the Scribbr Plagiarism Checker detected 24% plagiarism!"

Max Max Marketing Student

“Using Scribbr's plagiarism checker gave me the peace of mind to submit my research paper, knowing I didn't accidentally plagiarize. I'll certainly use it again!"

Fabiënne Leisure Management Student
Own sources checker upload sources

Own Sources Checker New

Have you used any unpublished or private documents as sources, such as an unpublished journal manuscript or a friend’s paper?

You can now add these documents to the Own Sources Checker and compare them against your document for plagiarism.

The Own Sources Checker is an add-on tool that is temporarily free (normally $14.95) in combination with the Scribbr Plagiarism Checker.

Discover how it works

Detailed plagiarism report

Similarity percentage

Similarity percentage

The similarity percentage indicates what portion of your text matches other sources in the database. It gives you a clear and accurate idea of the originality of your writing.

Document view

Similarities are highlighted in your document, allowing you to check them for incorrect or missing citations quickly. Each similarity corresponds to a source in the sidebar.

Matched source

Matched sources

In the sources overview, you can easily find the original source and see a preview of the original text, making it easy to compare it to your own writing and cite it correctly.

How the plagiarism checker works

Upload je scriptie voor een plagiaatcontrole

1. Upload

Upload a Word or PDF file of your paper. Multiple languages are supported.

2. Detect plagiarism

Your document is compared to billions of web pages, books, journal articles and more.

3. Plagiarism report

Similarities are highlighted and matched to the source. Then, the plagiarism percentage is calculated.

Plagiaat rapport met links naar alle bronnen

4. Fix plagiarism

Add missing citations or rewrite your text. Our plagiarism Knowledge Base can help you.

Features we're proud of

Industry-leading technology

We partner with Turnitin, the leader in plagiarism prevention software.

24/7 support
Plagiarism support

Our plagiarism experts are happy to answer all your questions! Call, email or chat with us!

Upload a friend's paper
Own Sources Checker New

Detect similarities between your paper and unpublished or private documents using the Own Sources Checker.

Plagiaat checker is veilig
Your paper stays yours

Unlike many other plagiarism checkers, we don’t add your document to a content database.

Plagiaat checker heeft ondersteuning voor vrijwel alle andere Europese talen.
Works with 20 languages

Our software detects plagiarism in 20 languages, including English, Spanish, and Arabic.

Most other plagiarism checks Plagiarism Checker
Easy-to-use plagiarism report
Advanced plagiarism detection software
Comprehensive content database
Helpful support team
Safe and confidential
Plagiarism Knowledge Base
Own Sources Checker

100% happiness guarantee

At Scribbr, we want you to be completely happy with the service we provide. If you’re not 100% satisfied, we’ll go the extra mile to change that, whether that means a full refund, a free second check, or something else. That is our 100% happiness guarantee.

Ready to detect and fix all plagiarism?

Small document
Up to 7,500 words $19.95 Per document
Regular document
7,500 - 50,000 words $29.95 Per document
Large document
50,000+ words $39.95 Per document
Check for plagiarism View plagiarism report


Ask our team

Want to contact us directly? No problem. We are always here for you.

Frequently asked questions

See all
Will my document be published on a (public) database?

No, the Scribbr Plagiarism Checker does not publish your document in any public database (unlike other plagiarism checkers).

In addition, you can delete all your personal information and documents from the Scribbr server as soon as you’ve received your plagiarism report.

Which sources are used for the Scribbr Plagiarism Checker?

The Scribbr Plagiarism Checker, in partnership with Turnitin, compares your document against the largest and fastest-growing content database in the world:

  • Over 91 billion current and historical web pages.
  • Over 69 million journal articles and books from more than 1,700 publishers such as Springer, IEEE, Elsevier, Wiley-Blackwell and Taylor & Francis.

The Scribbr Plagiarism Checker does not have access to Turnitin’s global database with student papers. Only your university can add and compare submissions to this database. However, you can use Scribbr’s Own Sources Checker to compare unpublished documents.

When should I use the Own Sources Checker instead of the Scribbr Plagiarism Checker?

The Scribbr Plagiarism Checker compares your document against the largest content database in the world. It will detect any similarities with documents in that database.

However, you might be unsure if all of the sources you used are in that database – for example, because some of your sources are unpublished. In this case, you can make use of our Own Sources Checker. Here you can add all the sources you want to a private database and compare them with your own document.

How long does the Scribbr Plagiarism Checker take?

The Scribbr Plagiarism Checker takes around 10 minutes.

For documents larger than 25,000 words it can take a bit longer. You will be shown an estimate on the order overview page.

As soon as the check is done we will send you an email.

Will I get a 100% match at my university when I use the Scribbr Plagiarism Checker?

No, you will never get a 100% match, because the Scribbr Plagiarism Checker does not store any documents in a shared database.

Will the result of the Scribbr plagiarism report be the same as at my university?

The Scribbr plagiarism report is similar to the report your supervisor will see, but there are two main differences:

Access to more detail and resources

The Scribbr Plagiarism Checker is optimized for students, which means that you will receive a detailed report with extra information and resources to fix and prevent plagiarism.

No access to private university databases

Your university might have a private database with submitted student papers that your document is compared with. The Scribbr Plagiarism Checker (or any other plagiarism checker) does not have access to this database.

However, many papers and theses are also published in public databases. The Scribbr Plagiarism Checker will compare your text with all documents that are in these public databases.

Can I check my document for plagiarism multiple times?

The Scribbr Plagiarism Checker checks your document for plagiarism once per upload. We recommend that you follow two simple steps to thoroughly revise all text snippets that might be plagiarized.

By following those steps, you can be confident that you have removed all plagiarism from your document. It is therefore not necessary to reupload your document for a new Plagiarism Check. If you would still like to perform a second or third check, you can purchase each new check at the regular price.

Step 1:  Review every similarity found by the Plagiarism Check

Think about whether or not the match makes sense to you:

  • Is the match a correctly cited quote, part of a reference list, or a general statement that does not relate to a specific author? Then you don’t have to revise it. You can simply exclude the similarity from your total score.
  • Is the match a text snippet (e.g. a series of words or a whole sentence) that you have copied from a publication without citing the source? Then move on to step 2.

Step 2: Revise each potentially plagiarized text snippet

There are two ways you can fix a similarity:

  • Paraphrasing: Rewrite the snippet in your own words. Be careful: Simply rearranging the sentence or replacing a few words with synonyms is not sufficient to remove plagiarism. It’s best to delete the similarity and write the idea again from scratch to ensure the phrasing is completely original.
  • Quoting: If you want to use the author’s exact words, put the text snippet in quotation marks.

Whether you paraphrase or quote, a citation is always required. Do you need more help revising your similarities? Have a look at our step-by-step guide.