Text Diff Checker — Free Online Tool
Compare two texts side by side and highlight differences online for free. Find added, removed, and changed lines instantly. Great for code and documents.
About Text Diff Checker
Our text diff tool compares two blocks of text and visually highlights every difference: additions are shown in green, deletions in red, and unchanged lines in white. The diff works at both line level and character level, making it easy to spot both large structural changes and small typo-level differences. Useful for comparing document revisions, checking if two code files match, reviewing configuration changes, comparing API responses, proofreading document edits, and verifying text transformations.
Frequently Asked Questions
Does it compare at word level or line level?
Both — line-level differences are shown first, then character-level differences within changed lines are highlighted.
Can I compare code files?
Yes — paste any code from any language for comparison.
What do the colours mean?
Green highlights = text added. Red highlights = text removed. White = unchanged.
Does it ignore whitespace differences?
Yes — a toggle lets you ignore whitespace and indentation differences.
Is there a side-by-side view?
Yes — both side-by-side and unified diff views are available.