Paste two versions of text below to see what changed, line by line.
About this tool
Compares two blocks of text line by line and highlights exactly what was added, removed, or unchanged between them — useful for reviewing an edited document or comparing two versions of a config file.
Frequently asked questions
Does this compare word-by-word or line-by-line?
Line-by-line — if a single line changes at all, the whole line is shown as removed-then-added rather than highlighting the specific changed word within it. For most editing/review use cases this is clearer than a character-level diff.
Is there a size limit on the text I can compare?
Very large inputs (rough guideline: over ~2,000 lines per side) are capped with a warning, since the comparison algorithm's cost grows with both texts' combined size and could otherwise freeze the tab.