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Code Diff

Compare code snippets side by side and review changed lines in the browser.

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Diff result
  function total(items) {
-   return items.length
+   return items.reduce((sum, item) => sum + item.count, 0)
  }

Code Diff: Runs in your browser for quick review before committing, publishing, or sharing.

Code Diff online

Use Code Diff in the browser for quick code diff and formatting workflows. MKDiff keeps the page focused on practical input, preview, and review steps so you can finish a one-off task without installing a desktop utility.

Compare code snippets side by side.
Review changed lines before committing.
Check examples copied from documentation.