How it works
The comparison is done line by line using the longest common subsequence (LCS) algorithm — the same principle behind git diff. Identical lines show in gray, lines removed from the original text show in red (with a "−"), and lines added to the modified text show in green (with a "+").
When to use it
Useful for comparing two versions of a config file, a code snippet before/after an edit, or any text where you need to quickly spot what changed.
Frequently asked questions
Is the comparison done by line or by word?
By whole line — each line is treated as a unit, matching git diff's default behavior.
Is my text sent to any server?
No — the entire comparison happens locally in your browser.