Text Diff Checker
Paste two versions of any text to see a clear, line-by-line comparison with additions, removals and changes highlighted side by side.
Runs entirely in your browser — nothing is uploaded.
About Text Diff Checker
Paste two versions of any text to see a clear, line-by-line comparison with additions, removals and changes highlighted side by side.
- Line-by-line diff highlights added, removed and unchanged lines.
- Optional word-level highlighting pinpoints exactly what changed.
- All comparison happens locally — paste confidential text safely.
Text Diff Checker is part of Upwwards Tools, a free collection of browser-based utilities built by the team at Upwwards. Like the rest of the suite, it's free, requires no sign-up, and keeps your data on your device.
Frequently asked questions
What is Text Diff Checker?
Paste two versions of any text to see a clear, line-by-line comparison with additions, removals and changes highlighted side by side.
Is Text Diff Checker free to use?
Yes — Text Diff Checker is completely free with no sign-up, account or usage limits. It is part of the free Upwwards Tools collection built by Upwwards.
Is my data private when I use Text Diff Checker?
Text Diff Checker runs entirely in your browser. Everything you enter or upload is processed locally on your device and is never sent to a server, stored or logged.
Do I need to install anything to use Text Diff Checker?
No. Text Diff Checker works instantly in any modern web browser on desktop or mobile — there is nothing to download or install.