Text diff checker
Highlights what changed between two blocks of text.
- Free
- No sign-up needed to try
- Runs in your browser
Sign in to use this tool
Text diff checker is free once you're signed in — one quick account unlocks every tool on Alux Tools, no payment, ever.
How this works
Paste an original and a changed version. A line-by-line diff highlights additions and removals in place.
Both texts stay in your browser and are never uploaded.
Frequently asked questions
Is the text diff checker free?
Yes. Text diff checker is free to use, with no software to install and no hidden fees.
Is my data uploaded anywhere?
No. This tool runs entirely in your browser, so what you enter or select never leaves your device.
Does it work on phones and tablets?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.