How to compare two texts
Paste your original text on the left and the changed version on the right, then click "Compare." The tool aligns the two versions line by line and highlights what's different: green for lines that were added, red for lines that were removed. Tick "Ignore case" if you want to treat uppercase and lowercase as the same.
When to use a diff checker
- Proofreading edits — see exactly what changed between two drafts
- Comparing code or config — spot differences between two versions of a file
- Reviewing contracts — check what's different between two versions of an agreement
- Catching copy-paste errors — confirm two blocks of text really match
Your text stays private
The comparison runs entirely in your browser — useful when comparing contracts, code, or any sensitive text. Nothing is uploaded. Need to count words instead? Try the word counter.