Code Diff Viewer
Compare two code snippets and highlight the differences between them.
Next-Level SaaS Tools — Launching Soon:
About the Code Diff Viewer
The Code Diff Viewer compares two versions of code side by side and highlights every change, so you can see exactly what was added, removed, or modified. It’s a focused way to review edits without a full version-control setup.
Reviewing code changes is essential and error-prone by eye. A clear diff makes it easy to verify a fix, spot an unintended change, or understand what a teammate altered — line by line, with differences called out.
Comparison runs in your browser, so your code never leaves your device. There’s no upload or account; paste two versions and review the differences privately.
How to use the Code Diff Viewer
- Paste the original code into the first panel.
- Paste the modified code into the second panel.
- Run the comparison.
- Review the highlighted additions, deletions, and changes.
- Use the diff to confirm or merge the edits.
Common use cases
- Reviewing what changed between two versions of a file.
- Verifying that a fix didn’t introduce unintended changes.
- Understanding edits a teammate made to a snippet.
- Comparing a refactor against the original code.
Frequently asked questions
How is this different from the Text Diff Viewer?
Both highlight changes; the Code Diff Viewer is oriented toward comparing source code side by side, which suits reviewing edits and refactors.
Does it understand my programming language?
It compares the text of the two versions and highlights differences line by line, which works across languages.
Can it merge the changes?
It shows the differences for you to review and merge manually, keeping you in control of the final result.
Is my code uploaded anywhere?
No. The comparison happens in your browser, so your code never leaves your device.
Can I highlight the result afterward?
Yes. Use the Syntax Highlighter to present the final code with coloring once you’ve reviewed the diff.