Text Diff
Compare two texts and highlight the differences line by line.
About Text Diff
Text Diff compares two blocks line by line and marks what was added, removed or left unchanged — the fastest way to review a config change or verify that an edit did only what it claimed.
Comparison happens in the browser, so drafts and credentials never leave the page.
How to use Text Diff
- 1
Paste both versions
Original on the left, changed version on the right.
- 2
Compare
Additions are highlighted green, removals red, unchanged lines neutral.
- 3
Review the hunks
Read only the changed blocks; large documents stay readable.
Questions about Text Diff
Word-level or line-level?
Line-level by default, which suits code and config. Word-level is better for prose.
Can it ignore whitespace?
Yes. Enable it to avoid noise from re-indentation.
How large can the inputs be?
Limited by browser memory; a few thousand lines compare instantly.
Is my text uploaded?
No. The diff runs locally.
Related tools
Last updated November 2026. Files are processed on FilePlume's own hardware and deleted within 60 minutes; nothing is used for training.