Configuration change
- Input
- PORT=3000
- Result
- PORT=8080
The old line is removed and the new line is added.
Text Diff Viewer
Compare an original and changed version line by line. The comparison runs locally and can ignore whitespace-only changes.
Diff
+0 added · −0 removed
Original
Changed
1
1
Runs entirely in your browser. This page is a static file. Whatever you type stays in the tab, is never sent to a server, and is gone when you close it — so pasting a real token or config is safe.
When you reach for this
- Comparing configuration revisions.
- Reviewing log output from two runs.
- Finding small changes in generated files.
Worked examples
Where people get this wrong
Comparing secrets
This tool is local, but screenshots and copied diff output can still expose sensitive values.
Frequently asked questions
How large can the input be?
The viewer compares up to 600 lines per side to keep the browser responsive.