Free Text diff (line by line)
Compare drafts, configs, or logs locally without uploading to a diff server.
How to use this tool
- 1
Open Text diff
Use it for this task: Text comparison, line-by-line added / removed highlights, private local diff.
- 2
Add both versions
Paste the old and new content into the two input panels so the tool can compare them side by side.
- 3
Review the differences
Use the highlighted changes to copy the final version, fix mismatches, or share the diff.
Quick facts
| Runs offline? | Yes — after load, processing stays in your browser. |
|---|---|
| Uploads data? | No. Your input is not sent to our servers. |
| Account required? | No signup or login. |
| Locales? | UI in 7 languages; tool logic is locale-agnostic. |
Top use cases
- Text comparison, line-by-line added / removed highlights, private local diff.
- Runs offline?: Yes — after load, processing stays in your browser.
- Uploads data?: No. Your input is not sent to our servers.
- Account required?: No signup or login.
- Locales?: UI in 7 languages; tool logic is locale-agnostic.
FAQ
Does my data leave this device?▾
No. This tool runs in your browser tab; we do not receive your input.
How is this different from desktop software?▾
No install — open and use. Best for quick, small jobs.
How large can inputs be?▾
Limited by device memory. Very large inputs may be slow — split batches if needed.
Mobile browsers?▾
Modern mobile browsers work; heavy jobs are smoother on desktop.
How accurate are results?▾
We use standard Web APIs; verify critical outputs yourself.
How to report issues?▾
Use the Contact link in the site footer.