Text Diff Checker | Compare Text & Find Differences Online 🔍

Ever lost track of what you changed in a long document or a piece of code? This Text Diff Checker allows you to compare two versions of text side-by-side. It instantly highlights added or removed lines, making it easy to spot even the smallest modifications.

Perfect for developers, writers, and editors who need a reliable way to verify changes without manual "spot-the-difference" headaches.

💡 About This Tool

Manually comparing two texts is prone to human error. This tool automates the process by providing a clear, color-coded visual representation of differences.

• For Developers: Quickly review changes in code snippets or configuration files.
• For Content Creators: Track edits made during the proofreading process.
• For Legal & Admin: Compare clauses in contracts or different versions of reports.

📘 Pro Tips

• Simple Copy & Paste: Paste your "Original" text on the left and the "Modified" version on the right. Hit "Compare" to see the magic.
• Toggle Whitespace: Use the "Ignore Whitespace" option if you want to focus only on text changes and ignore trivial differences like extra spaces or empty lines.
• Visual Color Coding: Red highlights indicate text that was removed, while Green highlights show what was added.
• Line Numbers: Each row includes line numbers for easy reference, making it simple to find the exact location of a change in your source file.

🧐 FAQ

• Q: Is my text data safe?
• A: Absolutely. This tool runs entirely in your browser using JavaScript. No text is ever uploaded to a server or stored.
• Q: Can I compare code?
• A: Yes! It works great for CSS, JSON, HTML, and most programming languages, though it is optimized for general text comparison.
• Q: What is the maximum text size?
• A: It can handle several thousand lines comfortably. For extremely large files (e.g., massive database dumps), your browser might slow down slightly.

📚 Trivia

The term "Diff" comes from the Unix diff utility, first released in 1974. It was created by Douglas McIlroy and James Hunt. Before graphical interfaces existed, developers relied on diff to generate "patches"—small files that only contained the changes, which could then be sent via email to update someone else's code. Modern version control systems like Git still use these fundamental concepts to track every single change in the world's most complex software!