Diff / Compare
Text Diff Viewer
Highlight additions, removals, and edits for quick review.
Text Diff Viewer
Compare two text blocks line-by-line. Stable URL: /tools/text-diff-viewer
Copy
Line diff
Privacy + persistence
This tool stores only local preferences/history in your browser (localStorage) under toolz.local.tool.text-diff-viewer. No account is required, and anonymous one-off usage works without sync.
Saved locally: latest left/right input, last selected preset, recent preset history. Optional authenticated sync may be added later for cross-device workflows, but it is not required.
Output actions
Ready to copy output once your result appears.