Diff Checker
See exactly what changed.
Runs in your browserAbout
Diff Checker compares two blocks of text and highlights exactly what changed, at your choice of line, word, or character granularity — line-level for comparing whole documents, character-level for spotting a single typo in a long string. A stats bar summarizes how many lines were added, removed, or left unchanged. Both texts stay in your browser; nothing is sent to a server to compute the diff.
Frequently asked
- What's the difference between line, word, and character granularity?
- Line mode is best for comparing whole documents or code where entire lines change; word and character modes zoom in further, useful for catching a small edit inside a single paragraph or sentence.
- Can it ignore whitespace differences?
- Yes, there's an option to ignore whitespace-only changes so reformatting alone doesn't show up as a diff.