What is a text diff checker?

A text diff checker (or difference checker) is a tool that compares two sets of text and highlights the lines that have been added, removed, or changed between them. It's an essential tool for code reviews, version control, and comparing document revisions.

Is this text comparison tool safe for sensitive data?

Yes, this tool is 100% safe and private. The entire comparison process happens directly in your web browser using JavaScript. Your text is never sent to our servers, ensuring your data remains completely confidential.

Text Diff Checker - Compare Two Texts Online Instantly

Original Text:

Modified Text:

Differences:

No comparison performed yet.

Original Text

Modified Text

Why Use Our Text Diff Checker?

Our Text Diff Checker is designed for developers, writers, and anyone who needs to compare two pieces of text quickly and accurately. It's built with speed, privacy, and simplicity in mind.

100% Secure & Private: The entire comparison happens in your browser. Your text is never sent to a server, ensuring your data remains completely private.
Blazing Fast: Since there are no server uploads, the difference calculation is instant, even for large blocks of text.
Clear, Side-by-Side View: We provide a clear, side-by-side view with highlighted additions, deletions, and changes, making it easy to spot differences at a glance.
Perfect for Code: The tool uses a monospace font and preserves indentation, making it ideal for comparing source code, configuration files, and JSON or XML documents.