Is this plagiarism checker free?

Yes. It is free with no signup or limits.

Does it check against the internet?

No. It only compares the two texts you paste here. For web-wide checks you need a crawler-based service.

Yes. The comparison runs locally in your browser and your text is not uploaded.

Can I copy the similarity report?

Yes. Use the Copy report button to share the similarity summary.

✓ Pasted text✓ Public web sources✓ Highlighted evidence

Plagiarism Checker

Q: How does this plagiarism checker work?

It breaks each text into overlapping word groups (n-grams) and compares the sets. The similarity score is based on shared n-grams using Jaccard similarity. Matching words are highlighted so you can review context.

Q: What n-gram size should I use?

Use 3-4 for short text and 5-6 for longer documents to reduce false matches.

Compare writing against pasted content and public source URLs. Review per-source scores and exact matching passages.

Public source URLs — one per line, maximum 5

Original writing

Optional pasted comparison

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How to use Plagiarism Checker

Three steps. Instant results.

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Step 1

Paste original writing.

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Step 2

Add comparison text or fetch up to five public source URLs.

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Step 3

Review overall coverage, source scores, and highlighted matching phrases.

How Plagiarism Checker works

The checker extracts text from public URLs, creates overlapping 3-6 word fingerprints, and compares each source against your original. It reports original-text coverage and Jaccard similarity separately, then highlights matching passages for manual review. This provides traceable evidence instead of one unexplained score.

Why use this Plagiarism Checker?

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Compare pasted documents and public web pages

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Per-source similarity and coverage scores

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Exact matching passages highlighted

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Adjustable phrase sensitivity

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No account or paid API required

Frequently asked questions

How does this plagiarism checker work?

It compares your original against pasted text and up to five public web pages. Each source gets an n-gram similarity score and matching passages are highlighted.

Does it search the whole internet?

It checks the public URLs you provide. It does not claim exhaustive coverage of every indexed page. Add likely source URLs for evidence-backed comparison.

What n-gram size should I use?

Use 3-4 words for short writing and 5-6 words for long documents to reduce common-phrase matches.

Can every web page be fetched?

No. Paywalls, login pages, robots restrictions, and sites that block automated requests may reject extraction.

Is my pasted text stored?

No. Comparison runs in your browser. URLs are fetched only to extract the public page text for your check.

Can I copy the report?

Yes. The report lists the overall score and every checked source.

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