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Everyone can see the current score. Signed-in users can leave a 1 to 5 star rating, and any written review goes only to review@cleanor.app.
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A quick way to understand who this helps, what it solves, and where it connects next.
Writers, editors, and developers comparing text versions.
Using the text diff checker without installing anything or signing up.
Capture text-diff-checker intent with a fast, browser-side tool that runs 100% locally.
Cleanor Labs
These sections explain the job in plain language and set expectations for what the tool should do well.
Text Diff Checker compares an original and a changed version of any text and shows precisely what moved. It runs a Longest Common Subsequence algorithm to align the two versions, marks whole lines as added or removed, and drills into modified lines to highlight the exact words that changed. You get instant counts of added, removed, and unchanged lines, plus a one-click copy of the result as a standard unified diff. Everything runs in your browser, so even sensitive drafts, contracts, or code never leave your device.
Short answers for the questions people usually have before trying a utility like this.
Both. Lines that were only lightly edited are paired up and highlighted at the word level, while wholly new or deleted lines are marked in full.
No. The comparison runs entirely in your browser using JavaScript, and nothing is ever sent to a server.
Yes. Use Copy diff to grab the comparison as a unified +/- text block you can paste into an email, ticket, or commit message.
Every tool on Cleanor is free with no sign-up, no credits, and no limits. Files are processed privately in your browser. Looking for on-device phone cleanup and Premium features? That lives in the Cleanor app.
Compare two blocks of text and see exactly what was added, removed, or changed, line by line and word by word.
Enter text in both fields to see the differences highlighted here.
Compared locally in your browser.