Paste two texts and get a similarity score right in this tab. Nothing is uploaded - the comparison runs on your device.
Example result (what the AI comparison looks like - no download needed):
Meaning similarity: 77% - similar meaning
The two texts share only about 11% of their words, yet the meaning score is high - that is exactly what a semantic comparison catches and a character-level diff cannot.
How to compare two texts for similarity in your browser:
- Paste the first text in the left box and the second text in the right box.
- Click "Compare word overlap" for an instant verbatim comparison, with no download at all.
- Optionally click "Compare meaning with AI" - it downloads a ~24 MB language model once (already cached if you used the keyword extractor on this site), then scores MEANING on your device.
- Read the per-sentence breakdown to see which sentences of one text match which sentences of the other.
Text Similarity Checker - Compare Texts by Meaning (No Upload)
Compare two texts and get a meaning-based similarity score - entirely in the browser, nothing is uploaded. Paste a draft and its rewrite, two product descriptions, or an original and a summary - the score tells you how close they are in meaning.
A per-sentence breakdown shows which sentences of one text match which sentences of the other, so you can see WHERE the overlap in meaning sits. The comparison model (about 24 MB) downloads once on your explicit click, with the size stated first, and is cached by the browser for next time; a basic word-overlap mode works with no download at all.
This page scores MEANING, which makes it different from the text diff tool on this site: the diff shows exact character-level changes between two versions, while this checker can score two passages as similar even when almost no wording is shared. Use the diff when you need to see every edit; use this checker when you need to know whether two texts say the same thing.
It is not a plagiarism detector - there is no source corpus and no originality verdict; the score compares only the two texts you paste. English works best; other languages and very short texts score less reliably.
Frequently Asked Questions
What does the text similarity checker do?
It compares two pasted texts and returns a meaning-based similarity score, plus a per-sentence breakdown showing which sentences of one text match which sentences of the other. Everything runs in your browser - nothing is uploaded.
Is this a plagiarism detector?
No. There is no source corpus and no originality verdict - the score compares only the two texts you paste. Two texts can score high with zero copied wording, and a low score does not prove originality.
How is this different from the text diff tool?
The text diff shows exact character-level changes between two versions of a text. This checker scores MEANING, so two passages can score high even when almost no wording is shared. Use the diff to see every edit; use this checker to judge whether two texts say the same thing.
Do I have to download anything?
The basic word-overlap mode works instantly with no download. The AI meaning mode downloads a language model of about 24 MB once, on your explicit click, and your browser caches it for next time - it is the same model the keyword extractor on this site uses, so if you have used that tool the download is already cached. Your texts never leave the device in either mode.
Does it work in every language?
English works best. Other languages produce scores but less reliably, and very short texts (under about ten words) score unreliably in any language.