Diff Checker Online

How to use Diff Checker

• Paste or type 'Original Text' in the left panel and 'Modified Text' in the right panel.
• Insertions are highlighted in green and deletions in red, with line numbers.
• Both panels are editable — changes update the diff view in real time.
• Click 'Clear Both' to reset both panels.

Edge Cases & Limitations

• Very large files (100K+ lines) may cause the diff engine to slow down.
• Binary content is not supported — paste text or code only.
• The diff is computed character-by-character, not word-by-word.

Keyboard Shortcuts

• Ctrl/Cmd + K — Open Command Palette to switch tools instantly.