Diff Checker
See exactly what changed.
About
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.