Code Diff Viewer for Pull Request Review

Not every pull request review happens in GitHub or GitLab. Sometimes you receive code changes via email, a shared document, or a chat message. Sometimes the diff in your git platform is hard to read because of rebasing or large file changes. Sometimes you just want a clean, distraction-free view of what changed.

This code diff viewer gives you a professional, syntax-highlighted comparison of any two code snippets. Paste the original and modified code, select the language, and review in either side-by-side or unified view. Supports 50+ programming languages.

Effective code review requires understanding not just what changed, but why. Syntax-highlighted diffs make it easier to read the modified code as actual code — with proper coloring for keywords, strings, comments, and operators — rather than as raw text with colored backgrounds.

This tool is especially useful for reviewing code changes shared outside of a git platform: code sent in a Slack message, pasted in a Jira ticket, included in a design document, or received from a contractor who is not on your repository. It is also helpful for reviewing large refactors where the git diff is noisy due to file moves and renames.

For mentoring and code review training, this tool provides a clean interface for discussing specific changes without the overhead of setting up a full repository and pull request.