Free Tool
Free Text Diff / Compare Tool
Compare two blocks of text and see exactly what changed, line by line.
Free, private, no upload to a server. Everything happens in your browser.
All comparison happens 100% in your browser — neither text is ever uploaded anywhere.
Original
Changed
Everything You Need to Compare Text
Real Line-Based Diff
A proper LCS (longest common subsequence) algorithm — the same approach behind most diff tools — not a naive line match.
Unified Diff View
Added lines in green, removed lines in red, unchanged lines left alone, all in one readable view.
Ignore Case or Whitespace
Toggle either option to focus on meaningful changes instead of formatting noise.
Instant Summary
See counts of added, removed, and unchanged lines at a glance.
100% Private
Both texts stay in your browser — nothing is ever uploaded to a server.
Copy the Diff
One click copies the full unified diff, ready to paste anywhere.
