Line-by-line visual differences.. Diff Checker is a free online tool from the ToolsRift Developer Tools collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Paste original text on one side and the modified text on the other. The tool aligns the lines and highlights insertions, deletions and changes between them.
No — the comparison runs entirely in your browser, so your code and documents never leave your device.
Yes — paste any plain text including source code, JSON, YAML or logs to see a line-by-line difference.
By default whitespace differences are shown; trim your inputs first if you want to ignore leading or trailing spaces.