Diff
Compare two blocks of text line by line and see exactly what was added, removed or left alone.
Runs in your browser — nothing you type here is sent anywhere.
original
changed
+3
added
−2
removed
2
unchanged
40%
in common
diff
1-replicas: 3
2-image: web:1.4.2
1+replicas: 5
2+image: web:1.5.0
33 port: 8080
4+env: production
45 healthcheck: /healthz
Matched with a longest-common-subsequence pass, so an inserted line shifts nothing after it. Gutters show the original and changed line numbers.
Two versions of a config file, a response body before and after a change, a paragraph someone edited — the difference is usually small and finding it by eye is unreliable.
Paste both sides and the comparison is computed locally with additions and removals marked per line. Nothing is uploaded, which matters when the two things you are comparing are production configuration.
What people open it for
- Finding what changed between two config files
- Comparing an API response before and after a deploy
- Checking which lines an edit actually touched
In the terminal
tools diff
Every utility is also a command in the desktop's shell.