DiffDuo vs What the Diff

Read changes in two columns side by side, or switch to a single-column unified diff in the same format as git diff and patch files.

Darker highlights mark the exact words and characters that changed inside a modified line, not just the lines that differ.

The comparison runs entirely in your browser, so confidential code, contracts and config files never leave your device.

Ignore whitespace, indentation and capitalisation differences, and control how much unchanged context is shown around each change.