Developer tool
Text diff checker and comparison tool
Compare an original text version with a changed version and review line-level additions, removals, and unchanged content. Aegis keeps the comparison in the browser and caps large pastes to keep the interface responsive.
Useful for reviewing copy edits, configuration changes, notes, and code snippets before you commit or share them.
How to compare two text versions
- Paste the original. Add the earlier version to the Original field.
- Paste the changed text. Add the new version to the Changed field.
- Review the result. Inspect added, removed, and unchanged lines, then copy the summary if you need it elsewhere.
Diff checker features
- Separate original and changed text inputs.
- Line-level added, removed, and unchanged output.
- Added, removed, and unchanged line counts.
- Swap inputs when the versions are reversed.
- Local processing with a responsive input cap.
Text diff FAQ
Common questions
What does a text diff show?
A diff shows how two text versions differ, including lines that were added, removed, or left unchanged.
Can I compare code or configuration?
Yes. The tool accepts plain text, so it can be used for code snippets, configuration, notes, copy, or other line-oriented content.
Is there a limit on the amount of text?
The result is capped to keep large pastes responsive. The interactive tool communicates the limit while you work.
Does the comparison upload my text?
The comparison runs locally in the browser and does not need a server request to calculate the diff.