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Diff Checker

Compare two texts and highlight differences line by line.

Open Diff Checker
Private — runs in your browserInstant resultsFree forever

Key Features

Side-by-side or inline diff view
Line-by-line and word-level diffing
Added, removed, and modified line highlighting
Ignore whitespace option
Character-level diff for precise changes
Copy the merged or diff output

How to Use

1Paste the original text in the left pane
2Paste the modified text in the right pane
3View the highlighted differences
4Toggle whitespace ignoring if needed

Common Use Cases

Compare two versions of a config file
Review changes between document drafts
Diff API responses before and after a change
Spot subtle differences in contract text

Frequently Asked Questions

How does the diff algorithm work?
The tool uses the Myers diff algorithm, which finds the longest common subsequence between the two texts. This is the same algorithm used by Git.

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