Purpose
Mark line additions and removals or compare line presence only.
How it works
Line mode suits small configurations; presence mode treats lines as sets and ignores order and duplicates, so it is not a precise source-code patch.
Input
Enter text, numbers, a file, or a query target as required. Start with the page example to confirm the format, then replace it with your data.
Interpreting output
Confirm output format, units, and status, then compare with the input and target environment; successful formatting does not prove validity.
Limitations and privacy
This tool processes input locally in the browser and does not send it to the server.