Text Diff Checker — Compare Two Texts

Compare two texts side by side. Highlight deleted, added, and changed characters. Works offline — data stays on your PC.

Works offline. Your text never leaves your PC. Paste two versions of a document (or open two files) and see exactly what changed: • Deleted lines in red, added lines in green • Changed characters highlighted inside each line • Ignore spaces, case, full-width/half-width, or blank lines • Side-by-side or one-column view • Fold unchanged lines for a cleaner look • Save the result as HTML or a plain diff text No account. No upload. Everything runs in your browser. How to use 1. Click the extension icon to open the tool 2. Paste text into Before (A) and After (B), or open files 3. Choose ignore options if needed, then click Compare 4. Save or copy the result Single purpose: Compare two texts and highlight their differences. Permissions: None. This extension does not request host or special permissions. Privacy practices: Does not collect user data.