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Paper check online, free: AI and plagiarism check for research papers

PaperCheck at paper-check.me is an online paper check for research papers, theses and reports. It is free to start: 5 checks a week, up to 20,000 words each, sentence-level AI results and a plagiarism check against arXiv.

Written by Adithyan, a student who builds PaperCheck. Last updated 2 November 2026.

What it checks

It is not the same service as papercheck.in or papercheck.ai. See how they differ.

What it costs

The check is free (5 a week). Humanizing a whole paper costs Rs 30; the first 1,000 words are free once per account. If a paid run lowers the score by less than 5 points, 10,000 free words are added to your account (see the refund policy).

How to use it

  1. Open paper-check.me and paste your text or upload a Word or PDF file.
  2. Press Check for AI and sign in with Google.
  3. Read the highlighted sentences and decide what to fix.

Limits

The plagiarism check covers arXiv only, not the whole web. Scores are estimates and can differ from Turnitin.

Common questions

Is the online paper check really free?

Yes. 5 free checks a week, up to 20,000 words each.

Does it work on a thesis?

Yes. Long reports and theses up to 20,000 words per check are supported.

Is it the same as papercheck.in?

No. PaperCheck at paper-check.me is a separate service.

Check your paper: 5 free checks

More guides

PaperCheck is not affiliated with Turnitin, GPTZero, papercheck.in or papercheck.ai. Scores from any detector are estimates, not proof.