Text Diff Checker

Compare two texts and highlight the differences line by line.

The Text Diff Checker is a completely free online tool that requires no sign-up or account. Compare two texts and highlight the differences line by line. Instant results in your browser — no downloads, no limits.

📝 Compare Texts

Debugging is often just a game of "Spot the Difference." Our diff checker highlights the exact changes between two versions of text or code, saving you hours of manual comparison.

Finding the Missing Semicolon

When my code fails after a small change, I paste the "Working" version and the "Broken" version into this tool. It’s the fastest way to find a single changed character that is breaking your production build. We use a character-level diff algorithm for maximum precision.

Frequently Asked Questions

Is my code safe?
Yes. The comparison happens entirely in your browser using JavaScript. We never store or even see the text you paste.