Text Diff Checker — Compare two texts and see every addition and deletion highlighted
Paste two versions of a text to see additions in green and deletions in red, character by character. For checking contract revisions, reviewing code changes and comparing versions of a document. Everything stays in your browser.
Paste the before and after versions to see exactly what changed.
Text Diff Checker: tips and things to know
- Character-level highlighting shows exactly which words changed inside a line, useful for contract revisions.
- Works for code as well as prose.
- A screenshot of the coloured result is an easy way to share the changes.
How to use the Text Diff Checker
Paste both versions
Put the original in "Before" and the revised text in "After".
Read the diff
Green marks additions and red marks deletions, updated as you type.
Use the counts
The number of characters added and removed is shown above the result.
Text Diff Checker FAQ
Is my text sent to a server?
No. The comparison runs entirely in your browser.
Is there a size limit?
Only browser memory. Texts of a few thousand lines compare without trouble; very long texts switch to line-by-line comparison.
Which algorithm is used?
A character-level longest-common-subsequence diff, with changed characters highlighted inline.