Code Diff Viewer — Free Online Tool

Compare two code snippets and highlight differences with additions and deletions. Code Diff Viewer is a free online tool from the ToolsRift Code Formatters collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

Loading Code Diff Viewer…

How to use Code Diff Viewer

  1. Open the Code Diff Viewer above — it loads instantly, no account needed.
  2. Enter or upload your input. Everything is processed locally on your device.
  3. Get your result immediately and copy or download it with one click.

Frequently asked questions

How does the diff algorithm work?

The tool compares code line-by-line, highlighting added lines in green and removed lines in red, similar to git diff.

Can I compare any language?

Yes, the diff tool is language-agnostic. It compares text line-by-line, working with any programming language or text format.

Is this suitable for code reviews?

Yes, it's useful for quick comparisons and reviews. For production code reviews, use dedicated tools like GitHub or GitLab.

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