Check your paper
Find out how AI-written and how copied your paper looks, then fix it. 5 free checks a month, up to 20,000 words each.
Unlike most free checkers: your whole Word or PDF file, a Turnitin-style score, every flagged line with how to fix it, and plagiarism in the same report.
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PaperCheck is a writing-review tool and its scores are estimates, not proof. Do not use it for unethical purposes. You are responsible for how you use it; PaperCheck is not liable. Terms
Estimates from AI-text detectors and an arXiv comparison. Not proof, and not affiliated with Turnitin. Different AI detectors disagree: a low score here does not guarantee a low Turnitin score.
Connect your AI assistant
Then just tell it "check my paper". It sees the flagged sentences and rewrites them for you. Uses the same 5 free checks a month as the website ().
Claude Code works best: it runs on your computer, edits your Word or text file directly, and handles long papers without the chat limits of the web apps.