What Is a Text Diff Tool?

A diff (short for "difference") tool compares two text blocks and highlights what's been added, removed, or changed. Originally a Unix command-line tool, online versions make text comparison accessible to everyone without any technical knowledge.

Common Uses for Text Comparison

• Compare two versions of a contract or legal document
• Find changes between original and edited article drafts
• Compare configuration files
• Spot differences between two similar code snippets
• Check if two transcripts match

How to Compare Texts Online

1. Open Text Diff Checker.
2. Paste your first text in the left box.
3. Paste your second text in the right box.
4. Differences are highlighted: green = added, red = removed, yellow = changed.

Understanding Diff Output

• Line-by-line diff: Shows which entire lines changed
• Word diff: Highlights individual word changes within lines
• Character diff: Shows character-level differences — useful for spotting typos