The Text Diff Checker is a powerful, free online tool that helps you compare two blocks of text and instantly spot the differences. Whether you're reviewing code changes, proofreading documents, or validating content updates, this tool highlights every change, addition, or deletion for quick analysis.

Designed for developers, editors, writers, and QA professionals, the tool makes version comparison easy without the need for complex software or manual review.

Key Features

• 🧮 Instant comparison of two text inputs with side-by-side or inline views
• 🖍 Highlights differences including added, removed, or changed content
• 🧑‍💻 Ideal for developers comparing source code, or writers reviewing content revisions
• 📄 Supports plain text, code, paragraphs, and large blocks of content
• 🔐 100% online and secure – no data is saved or shared
• ⚡ Fast, lightweight, and mobile-responsive

How to Use the Text Diff Checker

1. Paste your texts: Copy and paste the original text into the left box and the revised text into the right box.
2. Click “Compare”: Press the “Compare” button to run the text diff algorithm.
3. Review the results: View highlighted differences in an easy-to-read format.
4. Refine as needed: Edit either input and re-run the comparison instantly.