Compare two texts side by side and instantly see their overlap percentage with highlighted matching phrases. This local n-gram comparison runs entirely in your browser — no uploads, no sign-up, no external databases. Adjust match sensitivity from High to Low to control how short phrases trigger matches. View exact shared phrases in both documents, plus stats on matched chunks, overlapping words, and longest continuous match.
This tool performs local n-gram text overlap analysis between two documents you paste. It is not connected to any external database or web index, so it identifies shared phrases between your texts but cannot detect content copied from the internet or other sources.
The sensitivity setting controls the minimum n-gram length that counts as a match. High (4 words) catches shorter overlapping phrases for more sensitivity, Mid (6 words) balances detection and false positives, and Low (8 words) only flags longer continuous blocks.
All n-gram comparison runs entirely locally in your browser. No text is uploaded to any server. The optional AI paraphrasing suggestions require you to enter your own API key in the AI settings panel, and those requests go directly to your chosen provider.
Yes — it helps you identify text overlap between two documents, such as your draft versus a source. However, the tool shows exact shared phrases so you can judge whether matches are legitimate (quotes, common phrasing) or problematic. Use it as a starting point, not a definitive verdict.