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Text Diff Checker
Compare two texts side by side. Highlight additions, deletions, and changes.
About diff checker
Compare two texts side by side. Highlight additions, deletions, and changes.
Everything is computed with plain JavaScript in your browser — what you type or paste stays on your device. It is free, needs no account and works offline once the page has loaded.
Features
- Highlight additions, deletions, and changes.
- Instant results as you type
- Nothing is sent to a server
- Copy to clipboard in one click
- Free, with no account required
- Works on desktop, tablet and phone
How to diff checker online
Open the tool
No sign-up and nothing to install — the tool is ready as soon as the page loads.
Enter your input
Paste both versions; additions, deletions and changes are highlighted side by side.
Copy or download
Copy the output to your clipboard or download it. Your input never leaves the browser.
Frequently asked
Is what I enter sent to a server?
No. Text Diff Checker runs entirely in your browser using plain JavaScript in your browser. Your input never leaves your device and we don’t store anything.
What input does it accept?
Plain text, pasted or typed. Nothing you enter is sent to a server.
Is there a usage limit?
No. Use it as often as you like.
Is Diff Checker free? Do I need an account?
Yes, it is completely free and there is no account, sign-up or watermark. It is one of 78 free browser tools from ModelsGroup.
Does it work on my phone?
Yes. It works in any modern mobile or desktop browser.
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