Text diff checker
Compare two versions of text and highlight what changed.
Differences appear here.
Both texts are compared only in your browser. Nothing is uploaded.
How to use this tool
- Paste the original text on the left and the changed version on the right.
- Click Compare. Removed lines are marked with a minus, added lines with a plus.
How the comparison works
The tool compares the two texts line by line. Lines that match stay plain, lines only in the original are shown as removed, and lines only in the changed version are shown as added. It is a simple, readable line diff rather than a word-level merge.
A real example
You edited a configuration file and want to confirm exactly what you changed before saving. Pasting the old and new versions side by side shows the added and removed lines at a glance, so nothing slips through unnoticed.
Common questions
Does it compare within a line?
It works at the line level. If a single character changes, the whole line shows as removed and added, which keeps the output easy to scan.