Developer ToolsLOCALRuns in your browser
Text Diff
Compare two blocks of text line by line and get a unified diff with added, removed, and unchanged line counts.
This tool handles input and primary processing in your browser and is designed not to send the input to QuickKit’s server.
How it works
The comparison is line-based using a longest-common-subsequence diff, and the output is a standard unified diff with configurable context. "Ignore whitespace" collapses runs of whitespace and trims each line before comparing; "ignore case" lowercases first. A trailing newline counts as an extra empty line. Each side is limited to 3,000 lines.