CleanDiff is a Chrome extension designed to enhance the GitHub code review experience by automatically appending '?w=1' to pull request diff URLs. This feature effectively hides whitespace changes, allowing developers to concentrate on significant code modifications without the distraction of formatting issues. The tool is particularly beneficial for teams looking to optimize their review process and improve efficiency.

The extension offers per-repository control, enabling users to toggle the whitespace feature on or off depending on the repository. It also includes optional toast notifications that provide unobtrusive updates when the URL changes. CleanDiff is lightweight, fast, and respects user privacy by not tracking personal data, making it a practical addition to any developer's toolkit.