Free Plagiarism Checker & AI Text Checker

Check plagiarism risk in your text — we flag patterns that trigger plagiarism software: generic phrases, excessive quotes, repetitive language, AI generated text patterns, and copy-paste indicators. Fix them before submitting.

⚠ This is NOT a plagiarism detector. It identifies writing patterns that INCREASE your risk of being flagged. Always run official plagiarism checks through your university.

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What triggers plagiarism detection software?

Plagiarism software (Turnitin, iThenticate, Urkund) works by comparing your text against a massive database of published papers, theses, and web content. It flags text that matches existing content — but it also highlights patterns that COMMONLY appear in copied text, even if you didn't copy.

Common triggers include: overly generic academic phrases that appear in thousands of papers ("plays a crucial role"), excessive direct quotation, repetitive sentence structures, uniform sentence lengths (suggesting machine translation or copy-paste), and strings of citations without your own synthesis.

Our tool identifies these patterns BEFORE you submit — so you can rewrite risky sections in your own voice. This is NOT about hiding plagiarism (which is wrong). It's about ensuring your original work doesn't get incorrectly flagged due to writing patterns.

What this tool checks

Generic academic phrases

Identifies cliché academic phrasing that matches thousands of papers and almost always gets highlighted.

Quote density

Flags if too much of your text is direct citations/quotes vs. your own paraphrased synthesis.

Repeated phrases

Finds 3+ word sequences that repeat multiple times — often indicates copying from a single source.

Sentence uniformity

Checks if all sentences are similar length — natural writing has variation, copied text often doesn't.

Vocabulary diversity

Low unique word ratio suggests repetitive language or over-reliance on one source's terminology.

Very long sentences

Sentences over 50 words are often directly copied without paraphrasing — a common Turnitin flag.

FAQ

Is this an actual plagiarism checker?

No. This tool does NOT compare your text against a database of existing papers. It identifies PATTERNS in your writing that are likely to trigger plagiarism detection software. For actual plagiarism checking, use Turnitin or your university's tool.

Can I use this to avoid getting caught?

This tool is NOT for hiding plagiarism. It's for ensuring your ORIGINAL work doesn't get falsely flagged due to common writing patterns. If you've actually copied text, the right thing to do is cite it properly — not try to disguise it.

What's a good risk score?

Below 25 is good — your writing has natural variation and unique voice. 25-50 means some patterns to review. Above 50 means significant rewriting is recommended before submission.

Is there a word limit?

No. This tool is free and unlimited — paste entire chapters if you want. It runs entirely in your browser (no data sent to any server).

Does this tool store my text?

No. All analysis runs in your browser (client-side JavaScript). Your text is never sent to any server or stored anywhere.