Online Text Diff Checker & String Tools
Compare text versions side-by-side with color-coded additions and deletions, strip duplicate lines and trailing spaces, or generate placeholder dummy text instantly.
Side-by-Side Text Comparison
Paste two blocks of text or code to see additions (green) and deletions (red) highlighted line-by-line.
Deduplicate Lines & Remove Whitespace
Instantly clean lists, sort entries alphabetically, or eliminate redundant blank lines from your data.
Lorem Ipsum Dummy Text Generator
Generate high-quality placeholder copy for websites, mockups, design prototypes, and publishing.
Frequently Asked Questions
Yes, 100%. All string comparisons, duplicate removals, and text formatting algorithms run inside your web browser. No text is transmitted or logged on any server.
Yes. The Diff Checker works with HTML, CSS, JavaScript, Python, JSON, and standard English documents.