Text Diff Checker
Compare two texts line by line and see exactly what changed. Added and removed lines are marked clearly. Runs entirely in your browser.
How it works
- 1
Paste the original text
The first version.
- 2
Paste the changed text
The updated version to compare against.
- 3
Read the differences
Added lines marked with +, removed lines marked with -.
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Devices supported
Frequently asked questions
Line by line — a changed word inside a line marks the whole line as removed and re-added.
How the comparison works
This tool compares the two texts line by line using the same longest-common-subsequence approach that source control tools like Git use, finding the smallest possible set of additions and removals that explains the difference between the two versions.
It is useful for reviewing edits to an article, comparing two versions of a config file, or spotting exactly what changed between drafts of a document.