About Compare Texts - Free Online Text Comparison Tool

✨ Features

🔒 Privacy First
All comparisons happen in your browser - no data sent to servers

🔍 Smart Detection
Uses Longest Common Subsequence (LCS) algorithm for accurate change identification

🎨 Visual Highlighting
Differences are highlighted in blue for easy identification

📊 Line-by-Line
Each line is numbered and compared side-by-side

⚡ Real-Time
Instant comparison with no server-side processing

🎯 Smart Scrolling
Click the arrow to jump directly to the first difference

💾 Original Storage
View your original unmodified texts anytime

📱 Responsive
Works seamlessly on desktop and mobile devices

🚀 How It Works

Paste or type your first text version in the left editor
Paste or type your second text version in the right editor
Click "Compare" to analyze the differences
Review highlighted changes - differences appear in blue
Navigate to the first difference using the down arrow
Check originals in the expandable section below if needed

🎯 Use Cases

Document Revision - Compare different versions of documents, contracts, or reports
Code Review - Quickly spot changes between code snippets
Content Editing - Track changes in articles, essays, or creative writing
Version Control - Manual comparison of text file versions
Academic Work - Compare drafts and revisions of academic papers
Email Templates - Verify changes in email or message templates
Translation Review - Compare original and translated texts

🛠️ Technology Stack

Pure HTML5 Vanilla CSS3 Vanilla JavaScript LCS Algorithm

No dependencies, blazing fast performance - The tool is built with pure vanilla technologies, ensuring minimal load times and maximum compatibility across all browsers.

🌟 Why Choose Compare Texts?

Feature	Compare Texts	Other Tools
Speed	⚡ Instant	Often slow
Privacy	🔒 100% Client-side	Server uploads
Cost	💰 Free Forever	Often paid
Installation	❌ None needed	App required
Accessibility	🌐 Any browser	Platform specific
Algorithm	🧮 LCS (accurate)	Basic string match

📦 Features in Detail

Intelligent Difference Detection

The tool uses a Longest Common Subsequence algorithm to find the optimal alignment between texts, ensuring accurate change detection even when lines are added, removed, or reordered.

Line Alignment

When texts have different numbers of lines, the algorithm intelligently aligns matching lines and highlights insertions/deletions clearly.

Character-Level Highlighting

Not just line differences - the tool highlights exactly which characters changed within each line for precise change tracking.

Original Text Preservation

Your original texts are preserved in read-only fields, allowing you to reference the unmodified versions at any time.

🤝 Contributing

Contributions are welcome! Feel free to:

🐛 Report bugs
💡 Suggest new features
🔧 Submit pull requests
📖 Improve documentation

Visit our GitHub repository to get started.

📄 License

MIT License - feel free to use this tool for personal or commercial projects.

📝 Compare Texts