What you get with a premium plagiarism check

Plagiarism Checker

Plagiarism Checker

Catch accidental plagiarism with high accuracy using similar plagiarism software as leading universities.

AI Detector

AI Detector

See what’s written by humans and what is AI-generated or refined with AI tools like ChatGPT, Perplexity, and Claude.

Grammar checked document

AI Proofreader

Find and fix spelling, grammar and style issues with the AI Proofreader.

Rely on the most accurate plagiarism checker of 2024

Rely on the most accurate plagiarism checker of 2024

Scribbr’s plagiarism checker detects plagiarism more accurately than other plagiarism detection tools—particularly when texts are heavily edited.

See test results

Free plagiarism risk analysis

Find out if your writing contains potential plagiarism

Scribbr’s free plagiarism checker alerts you if your writing matches content in our databases, helping you determine if you’ll benefit from upgrading to the Premium report.

📚 Largest database 99B web pages & 8M publications
🌎 Supported languages 20 languages
See a list of top matching sources

View your top 5 matching sources

The Sources Overview shows you the top five sources that match your writing. It’s important to cite these sources if you quoted or paraphrased from them.

Spelling meta report

Identify spelling and grammar issues in your document

In addition to checking for plagiarism, powerful AI software scans your English text for spelling and grammar issues. The free check gives an overview of the issues per category.

Submit your paper with confidence, knowing it’s free of plagiarism

Make your writing plagiarism-free with the premium plagiarism checker

Similarity percentage

Get a precise similarity percentage

The premium plagiarism checker provides you with an accurate similarity score that tells you what percentage of your paper is not original.

Highlighted similarities

Review highlighted text snippets for missing citations

Similarities in your document are highlighted for quick and easy reviewing. Each color corresponds to a source in the Sources Overview.

Original text comparison

Compare your writing to the original text side by side

Use the comparison feature to see how similar your writing is to the original without leaving the plagiarism checker report.

Check for self-plagiarism by uploading unpublished works

Check for self-plagiarism by uploading previous assignments

Upload previous assignments or a classmate’s paper to catch (self-)plagiarism that is otherwise difficult to detect by regular plagiarism checkers.

Review your spelling and grammar corrections in Word

Writing issues are corrected automatically when you upload a Word document. To review the corrections, you can download a Word document with Track Changes.

Price per document

Small document
Up to 7,499 words
$19.95
Regular document
7,500 - 49,999 words
$29.95
Large document
50,000+ words
$39.95

Prices are per check, not a subscription

Money-Back Guarantee
Excellent Review score
Scribbr’s plagiarism checker is rated 4.6 out of 5 based on 14,193 reviews.
Privacy guarantee
Privacy guarantee

Submissions will never be added to our content database. Therefore, no other plagiarism checker will see your text.

Plagiarism report

Scribbr's plagiarism checker is perfect for you if you:

  • Are a student writing an essay or paper
  • Value the confidentiality of your submissions
  • Prefer an accurate plagiarism checker
  • Want to compare your work against publications
  • Can benefit from an AI Detector

This plagiarism checker is not for you if you:

  • Are a copywriter, SEO, or business owner
  • Need to check lots of documents for plagiarism

Start for free

The go-to plagiarism checker for students and academics

University applicant

University applicants

Ace your admissions essay to your dream college.

Compare your admissions essay to billions of web pages, including other essays.

  • Avoid having your essay flagged or rejected for accidental plagiarism.
  • Make a great first impression on the admissions officer.
University applicant

University applicants

Ace your admissions essay to your dream college.

Compare your admissions essay to billions of web pages, including other essays.

  • Avoid having your essay flagged or rejected for accidental plagiarism.
  • Make a great first impression on the admissions officer.
Student

Students

Submit your assignments with confidence.

Detect plagiarism using software similar to what most universities and publishers use.

  • Spot missing citations and improperly quoted or paraphrased content.
  • Avoid grade penalties or academic probation resulting from accidental plagiarism.
Academic

Academics

Take your journal submission to the next level.

Compare your submission to millions of scholarly publications.

  • Protect your reputation as a scholar.
  • Get published by the journal of your choice.
Student running a plagiarism check

You don't need a plagiarism checker, right?

You would never copy-and-paste someone else’s work, you’re great at paraphrasing, and you always keep a tidy list of your sources handy.

But what about accidental plagiarism? It’s more common than you think! Maybe you paraphrased a little too closely, or forgot that last citation or set of quotation marks.

Even if you did it by accident, plagiarism is still a serious offense. You may fail your course, or be placed on academic probation. The risks just aren’t worth it.

Get started for free

Scribbr & academic integrity

Scribbr is committed to protecting academic integrity. Our plagiarism checker, AI Detector, Citation Generator, proofreading services, paraphrasing tool, grammar checker, summarize, and free Knowledge Base content are designed to help students produce quality academic papers.

We make every effort to prevent our software from being used for fraudulent or manipulative purposes.

Questions?

Ask our team

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

Frequently asked questions

See all
How accurate is Scribbr’s plagiarism checker?

Extensive testing proves that Scribbr’s plagiarism checker is one of the most accurate plagiarism checkers on the market in 2024.

The software detects everything from exact word matches to synonym swapping. It also has access to a full range of source types, including open- and restricted-access journal articles, theses and dissertations, websites, PDFs, and news articles.

What plagiarism and AI detection software does Scribbr use?

Scribbr uses advanced plagiarism detection technology similar to the software used by most universities and publishers, ensuring you receive the same or very similar results.

The add-on AI detector is powered by Scribbr’s proprietary software and is capable of detecting texts generated by ChatGPT, Perplexity and other generative AI tools with high accuracy.

To which databases will my document be compared?

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.
How long does it take to generate the plagiarism report?

Generating your (free or premium) plagiarism report takes between 1 and 10 minutes, depending on the document size.

In that time, your document is compared to the world’s largest content database, with over 99 billion webpages and 8 million publications.

What is the difference between the free and premium report?

The free report tells you if your text contains potential plagiarism and other writing issues. The premium report gives you the resources you need to review issues in detail and resolve them.

Free report Premium report (from $19.95)
Plagiarism Checker

  • Plagiarism risk assessment
  • Top matching sources

Grammar Checker

  • Number of writing issues
Plagiarism Checker

  • Precise similarity percentage
  • Complete list of matching sources
  • Document view to quickly review similarities
  • Side-by-side comparison with the original text
  • Upload private documents

Grammar Checker

  • Downloadable Word document with all your writing issues corrected using Track Changes

AI Detector

  • Precise AI writing percentage
Can I buy a monthly subscription for the Scribbr Plagiarism Checker?

At the moment we do not offer a monthly subscription for the Scribbr Plagiarism Checker. This means you won’t be charged on a recurring basis – you only pay for what you use. We believe this provides you with the flexibility to use our service as frequently or infrequently as you need, without being tied to a contract or recurring fee structure.

You can find an overview of the prices per document here:

Small document (up to 7,500 words) $19.95
Normal document (7,500-50,000 words) $29.95
Large document (50,000+ words) $39.95

Please note that we can’t give refunds if you bought the plagiarism check thinking it was a subscription service as communication around this policy is clear throughout the order process.

Scribbr Plagiarism Checker

Can other plagiarism checkers see my submissions to Scribbr?

Your writing stays private. Your submissions to Scribbr are not published in any public database, so no other plagiarism checker (including those used by universities) will see them.

What languages are supported by the plagiarism checker?

Scribbr’s plagiarism checker offers complete support for 20 languages, including English, Spanish, German, Arabic, and Dutch. The add-on AI Detector is available for English, Spanish, German, French and Dutch texts.

The complete list of supported languages:

  • Arabic
  • Bosnian
  • Croatian
  • Czech
  • Danish
  • Dutch
  • English
  • Finnish
  • French
  • German
  • Greek
  • Italian
  • Norwegian
  • Polish
  • Portuguese
  • Russian
  • Serbian
  • Spanish
  • Swedish
  • Turkish
Will Scribbr give the same result as my university’s plagiarism checker?

Scribbr uses similar plagiarism software to most universities, providing the same or very similar results.

However, universities may check your work against private student paper databases, which Scribbr can’t access, possibly leading to small differences.

To help, Scribbr offers a free Self-Plagiarism Checker add-on, allowing you to manually upload your source documents to ensure you haven’t accidentally plagiarized.