Comparison Tools
CodeDiff Online – Free Side-by-Side Code Compare
Compare two code snippets side by side with free CodeDiff changed-line highlighting. Runs locally in your browser with no sign-up or server upload.
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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.
What does CodeDiff compare?
CodeDiff compares two pasted code versions line by line and highlights additions, deletions, and unchanged lines. It is suited to quick snippet review; for repository history, merge conflicts, or staged changes, use your Git diff and merge workflow.
Compare code snippets side by side.
Review changed lines before committing.
Check examples copied from documentation.