Text Diff Checker
Compare documents or text and see the exact words that changed. Paragraph alignment, focused review, and private browser processing.
Preparing private browser tool…
Frequently asked questions
- What is Document mode?
- Document mode joins hard-wrapped lines into paragraphs, aligns matching paragraphs, and highlights the exact words that changed. Use Lines mode for code or line-sensitive text.
- Does it use a real diff algorithm?
- Yes. It uses a Myers diff for paragraph or line alignment, then runs a second word-level diff inside each modified section.
- Can I compare code with different indentation?
- Switch to Lines mode and enable "ignore whitespace" to normalize spacing and tabs before comparing.
- Is there a size limit?
- There is no fixed upload limit because comparison runs in your browser. Very large, completely different documents may use broader highlights to keep the page responsive.
- Can I ignore case?
- Yes. Toggle "ignore case" to compare texts case-insensitively without mutating the output.