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Online Plagiarism Checker
With Percentage & Sources

Our free plagiarism checker gives an instant originality report - similarity score, highlighted matches, and sources. No sign-up required.

Last updated: July 2026

Plagiarism Checker

FREE - 1,800 words / scan

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0 / 1800 words

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Tip: Rewrite flagged lines or add citations to raise your score.

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 runs a multi-step process to detect copied content and reworded passages, then reports a similarity percentage with sources so you can verify your writing is original.

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.

Deep Matching

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.

Similarity Score

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.

Color-Coded

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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AI Essay Writer

Generate a full, research-backed essay with citations in seconds.

Paraphrasing Tool

Rephrase flagged content with ease to bring your originality score up.

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.

Is this a free plagiarism checker for students?

Yes. Students use it to check essays, research papers, theses, and assignments before submitting. It's free with no sign-up, gives a similarity percentage with sources, and pairs with our paraphrasing tool and citation machine to fix flagged content.

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. Run flagged lines through our Paraphrasing Tool to rework them.

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.