Text diff checker

Paste two versions of a text to compare them line by line. Added lines show with +, removed lines with −. Nothing leaves your browser.

Ignore whitespace Ignore case

ORIGINAL TEXT

0 lines

CHANGED TEXT

0 lines

DIFF

Enter text on both sides to compare.

Lines are matched with a longest-common-subsequence algorithm, the same idea behind diff and Git. Very large inputs (roughly 2,000 × 2,000 changed lines) are rejected so your browser doesn't freeze.