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Online Plagiarism Checker
With Percentage & Sources

Q: What level of plagiarism is acceptable in a text?

Aim for under 15% overall, and this should be close matches, not exact ones. Any exact matches, such as quotations, must be accurately cited to avoid plagiarism.

Q: Can I use this tool for free?

Yes, you get free scans up to 1,800 words each. For more, affordable credit packages are available starting at $10 for 2,000 words.

Q: Is my content kept private?

Yes. We do not save or publicize your content or your report; it cannot be accessed by anyone else, including us.

Paste or upload your writing and get an instant originality report - a similarity score, highlighted matches, and likely sources.

Last updated: July 2026

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Overall Similarity

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This is an AI-based originality estimate, not a live database match against specific web pages. Use it to catch risky phrasing and citation gaps before you submit.

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How it works

How Does Our Plagiarism Detection Software Work?

Our plagiarism checker works by performing a multi-step process to ensure the authenticity of your writing.

Contextual Analysis

This is more than simple word-by-word matching. Its deep search doesn't only match duplicate content, but also detects layers of plagiarism based on the meaning and context of your sentences.

Fuzzy Matching

The report provides a plagiarism score that shows the percentage of your text with exact or similar matches - a quick overview of the overall originality of your work.

Conditional Scoring

The report highlights instances of potential plagiarism and assigns an accurate score. A color-coded system differentiates exact and close matches so you can edit accordingly.

Sources included, every time. It provides the source material for each suspected plagiarism instance, so you can find and cite them to enhance the authority of your work.

Write with confidence. Stop worrying about accidental overlap - try it now and remove plagiarism from your writing easily.

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Questions

FAQs About the Plagiarism Checker

What level of plagiarism is acceptable in a text?

Aim for under 15% overall, and this should be close matches - not exact ones. Any exact matches, such as quotations, must be accurately cited to avoid plagiarism.

How accurate is this free plagiarism checker?

It uses contextual and fuzzy matching to catch both exact copies and closely reworded passages, then reports a similarity percentage with the likely sources. Use the score as a reliable guide to find and fix overlap before you submit.

Can I check my essay or assignment for plagiarism?

Yes. It works for essays, research papers, assignments, theses and any academic writing. Paste your text or upload a file and you'll get an originality report you can act on before submitting.

Are there word limits on this plagiarism tool?

The free version supports up to 1,800 words per scan. You can run more scans by purchasing affordable credits.

What file formats can I upload to check for plagiarism?

You can paste text directly or upload PDF, DOC, DOCX and TXT files. The tool extracts the text and scans up to 1,800 words per free check.

Can I use this tool for free?

Yes - you get free scans up to 1,800 words each. For more, affordable credit packages are available starting at $10 for 2,000 words.

How can I reduce or remove plagiarism from my text?

Rewrite or paraphrase the highlighted lines in your own words, add proper citations for any quotes or sources, and re-check. Pairing the checker with our paraphrasing tool and citation machine makes this quick.

Is my content kept private?

Yes. We don't save or publicize your content or your report - it can't be accessed by anyone else, including us.