Compare texts

1. Paste text A and text B.
2. Pick comparison by lines or by words.
3. Optional: ignore case or extra whitespace.
4. Review the summary and highlighted diff.

• Detect changes between two versions of a text.
• Compare configs, lists or edited paragraphs.
• Verify that fixes have been applied before publishing.

• Up to 100,000 characters per text.
• Simple textual comparison based on LCS (longest common subsequence).
• Doesn't detect block moves; those show up as remove + add.

Processing happens in your browser — we don't upload the texts.

• Very long texts can be slow: complexity is O(n × m).
• Subtle whitespace or case differences look like real changes if those options are off.

• Diff via dynamic programming using LCS.
• Tokens by line or by word; original values are preserved in the output.