Diff checker · Guide
How to Compare Text Online
Comparing text is a two-paste operation. Here is how to read the result.
Paste both versions
Put the original on one side and the changed text on the other. The checker aligns them and marks every difference.
Read the highlights
Changed lines, additions and removals are colour-coded. Scan down the highlighted rows to see exactly what differs between the two versions.
Frequently asked questions
Can I use this for production work?
Yes, for inspection, formatting and quick generation. Still review the output before committing it to production code or configuration.
Ready to try it?
Open the free browser-based Diff checker and apply what you just read — no sign-up, runs locally.
Open the Diff checker tool