Diff Checker
Compare two blocks of text and highlight line-by-line differences instantly — 100% client-side, no data sent to any server.
OriginalPaste text here
ModifiedPaste text here
About this tool
Live diff as you type
No button to press — the diff updates instantly as you type or paste into either panel.
Three granularity levels
Switch between line, word, and character-level diffing to get exactly the level of detail you need.
Split & unified views
Use side-by-side split view for easy comparison, or unified view for a compact sequential diff.