Diff Checker

Paste two versions of a file, config or snippet to see a line-by-line unified diff: added lines in green, removed lines in red, unchanged lines dimmed. The comparison uses a longest-common-subsequence algorithm, so it lines up moved blocks sensibly rather than just comparing row-for-row. Toggle "ignore whitespace" or "ignore case" to focus on meaningful changes. Both inputs stay in your browser — nothing is uploaded.