Writing

Check text for originality

Paste text and get an originality assessment, repeated phrasing analysis, and rewrite suggestions.

For the best results: Paste the text to check. The AI flags unusual phrasing, unnatural sentence patterns, and passages that appear to be copied or lightly paraphrased.

AI can make mistakes. Check important information before relying on it.

FREE · PRIVATE · NO SIGN UP REQUIRED · NO ACCOUNT NEEDED

What is Plagiarism Checker?

Plagiarism Checker is a free AI writing tool that analyzes text for originality, flags repeated phrasing, and suggests rewrites. Your brief is routed to a model suited to writing work and comes back as polished, original writing drafts tailored to your tone and purpose in seconds. No account stands between you and the draft, and what you write is cleared when you close the tab, not banked.

✦Write immediately, with no account standing between you and the draft
✦Every request is routed to a model suited to writing work
✦Drafts and prompts are cleared when you close the tab

Models: It routes across leading models including Gemini, Llama and Mistral families, picking the best available one per request. The exact model used is shown after every response.

See it in action

A content marketer is about to publish a round-up piece assembled from several research notes and wants to be sure nothing was lifted too closely.

What you type

[Pastes a 600-word draft on remote-work productivity that borrowed phrasing from two source articles during note-taking]

What you get

Originality: 82% Close-match flag: "studies consistently show that flexible schedules improve employee retention" — near-identical phrasing to a common source sentence. Repeated internally: "boost productivity" appears 5 times. Rewrite: "When people choose their own hours, they tend to stick around — the retention data leans that way."

Tip: This flags phrasing overlap and internal repetition, not licensed access to journal databases, so use it to catch note-taking that stayed too close to the source rather than as proof of clearance. The fix for a flagged line is almost always to re-explain the idea from memory instead of nudging a word or two.

Use cases

What people use it for

Vet a guest post before it goes live, so recycled paragraphs don't dent your site's credibility.

Check your essay for accidental echoes of sources you paraphrased a little too closely.

Review outsourced copywriting before sign-off when the price seemed slightly too good to be true.

Who uses Plagiarism Checker?

Uni students

checking an assignment for accidental copying before it reaches a marker who runs the same scan

Blog owners

confirming a freelance writer delivered original work, not a lightly reworded lift from elsewhere

Classroom teachers

spotting patched-together passages in submitted work quickly before returning feedback to the class

How it works

1Describe what you need written, with tone and audience.
2A writing-tuned model drafts it to your brief.
3Copy the draft, or ask for a tighter, longer, or different-tone version.

Tips for the best results

Paste the finished text you intend to submit, not an early draft, so the check reflects reality.
Wrap genuine quotes in quotation marks with a source so honest citation is not mistaken for copying.
Focus on the repeated-phrasing analysis to see exactly which strings need rewording.
Rewrite flagged passages in your own words rather than swapping the odd synonym.
Re-run after edits to confirm the overlap has genuinely gone, not merely moved.

FAQ

Frequently asked questions

Does it compare my text against the whole internet?

It works differently to index-based checkers: rather than crawling a live database of sources, it analyzes the writing itself for phrasing that reads recycled, boilerplate structures, and close-paraphrase patterns. That makes it an editorial originality check, good for catching derivative writing early, not a legal-grade source-matching service with citations to specific pages.

What counts as repeated phrasing?

Three things get flagged: stock expressions and cliches that appear everywhere, sentences shaped suspiciously like standard reference material, and your own wording repeating across the piece. The last one surprises people; internal repetition reads lazy to editors and thin to search engines even when nothing is copied from anyone.

Will it fix the flagged sections for me?

Rewrite suggestions come with the analysis, and you can adopt, adapt, or ignore each one. A rewrite fixes wording, not attribution, though: if a flagged passage carries someone else's idea, it needs a citation whether or not you rephrase it. Originality of expression and honesty about sources are separate obligations.

If my text passes here, will it pass my university's checker?

Don't treat one as a proxy for the other. Institutional systems match against their own databases, including past student submissions you can't see, so no external check can guarantee their result. Use this to find and fix weak paraphrasing before submission; it makes a clean institutional report more likely, not certain.

How should I handle quotes and references in what I paste?

Quoted material will naturally read as non-original, because it is, so either paste only your own prose or note that certain passages are deliberate quotations. Reference lists are worth leaving out entirely; they follow rigid formats that add noise to the analysis without telling you anything about your writing.

Is the plagiarism checker free with no sign-up?

Yes. Paste your text and get an originality assessment with repeated-phrasing analysis at no cost and with no account. Run as many checks as you need. Nothing is held back behind a paid plan, and there is no watermark on anything you copy out.

Is my submitted text stored or added to a database?

Unlike some institutional checkers, this tool does not add your writing to a shared student-work database. That matters because checking your own draft here will not later cause it to be flagged as matching itself. Paste your text, read the analysis and copy it back out.

Can I check a whole dissertation at once?

You can paste long passages in one go. For a full dissertation or report, check it in sections so the repeated-phrasing analysis stays easy to act on. Working section by section also makes it clearer which specific parts need rewording before you submit.

What are the usage limits?

Writing tools are unmetered during the current free launch phase, draft, redraft, and polish without counting requests. Only a short per-minute anti-abuse limit applies, which normal writing never touches. Paid plans with higher limits and priority model access are coming soon.

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