Text Diff Checker

What is a Text Diff Checker and how does it work?

A Text Diff Checker is an online tool that compares two blocks of text and highlights the differences between them. Our tool instantly shows insertions, deletions, and unchanged text, making it easy to spot changes, revisions, or plagiarism. Simply paste or type your two texts, click Compare, and see the differences highlighted in color. All processing is done in your browser for maximum privacy.

Who should use a Text Diff Checker?

This tool is perfect for writers, editors, students, teachers, developers, legal professionals, and anyone who needs to compare two versions of a document, essay, code, contract, or any text-based file. It’s also useful for detecting plagiarism, reviewing revisions, and ensuring content accuracy.

What types of text can I compare?

You can compare any type of text: essays, articles, blog posts, code snippets, contracts, research papers, reports, and more. The tool supports large documents and works with all Unicode characters, including special symbols and non-English languages.

How accurate is the comparison?

Our tool uses a robust diff algorithm to accurately detect insertions, deletions, and unchanged text. It highlights changes at the word and character level, ensuring you never miss a difference. The algorithm is optimized for both speed and accuracy, even with large documents.

Is my text safe and private?

Yes! All text processing happens locally in your browser. Your data is never uploaded, stored, or shared. This makes our tool ideal for sensitive documents, confidential contracts, and academic work.

Can I use the Text Diff Checker on mobile?

Absolutely! The tool is fully responsive and works perfectly on smartphones, tablets, and desktops. You can compare texts on the go, in class, or at work—anywhere, anytime.

What are the main features?

• Instantly compare two texts and highlight differences.
• Handles large documents (thousands of words).
• Highlights insertions (green), deletions (red with strikethrough), and unchanged text.
• Copy, clear, or download each input for easy workflow.
• 100% privacy—no uploads, no tracking, no registration.
• Mobile-friendly and accessible for all users.

How do I use the Text Diff Checker?

1. Paste or type your first and second texts into the input boxes.
2. Click the Compare button.
3. View the highlighted differences below.
4. Copy, clear, or download your inputs as needed.

What are some common use cases?

• Writers & Editors: Track changes between drafts, spot edits, and ensure accuracy.
• Students & Academics: Detect plagiarism, compare research papers, and review revisions.
• Developers: Compare code snippets, configuration files, or documentation.
• Legal & Business Professionals: Review contract changes, policy updates, and ensure compliance.
• Content Managers: Audit website updates, blog posts, and marketing materials.

Does the tool support large documents?

Yes! You can compare essays, articles, or code files with hundreds or thousands of words. The tool is optimized for performance and can handle large files efficiently.

Is the Text Diff Checker free?

Yes, it is completely free and always will be. No registration, no watermark, no hidden fees.

Can I bookmark or share this tool?

Yes! Bookmark this page for quick access. You can also share the link with colleagues, classmates, or friends who need to compare texts.

What makes PDF Station’s Text Diff Checker different?

• Completely private—no uploads, no tracking, no storage.
• Handles large files and complex documents.
• Modern, mobile-friendly interface.
• Free, unlimited use for everyone.
• Part of the trusted PDF Station suite of tools.