How Does the Diff Checker Work?

Our diff checker compares two blocks of text line by line and highlights the differences. Added lines are shown in green, removed lines in red, and unchanged lines stay neutral.

Features

Side-by-side view — See both versions next to each other with differences highlighted
Inline view — See all changes in a single unified view
Ignore whitespace — Focus on meaningful content changes
Ignore case — Compare text regardless of capitalization
Word-level highlighting — See exactly which words changed within a line

Common Uses

Comparing code before and after changes
Reviewing document revisions
Checking configuration file differences
Verifying copy-paste accuracy
Proofreading edited text

Is this tool free?

Yes, completely free with no sign-up or limits.

Is my data safe?

All processing happens in your browser. No text is sent to any server.