Diff Shuttle
Compare texts, code, JSON, CSV files side by side in your browser. 100% private, no uploads, no registration.
Why Diff Shuttle
How It Works
Paste or Upload
Paste your original text or upload a file on the left side
Add Modified Text
Paste or upload the modified version on the right side
See Differences
Differences are highlighted instantly with color coding
Why Text Comparison Matters
Text comparison is essential for developers, writers, and anyone working with documents. Whether you're reviewing code changes, comparing configuration files, or tracking document revisions, a reliable diff tool saves time and prevents errors. Traditional desktop tools require installation, and many online tools upload your files to remote servers — raising privacy concerns for sensitive code and documents.
Diff Shuttle solves this by running entirely in your browser. Using advanced diff algorithms powered by the npm 'diff' library, it provides instant, accurate comparisons without any data leaving your device. Support for multiple formats — plain text, source code, JSON, and CSV — makes it a versatile tool for any comparison task.
How Diff Shuttle Differs from Other Tools
Unlike DiffChecker, Text-Compare, and similar online tools, Diff Shuttle never uploads your files to any server. All comparison happens locally using JavaScript, ensuring complete privacy for your code, documents, and data. This is especially important for developers comparing proprietary code, businesses reviewing contracts, and anyone handling sensitive information.
Diff Shuttle also offers multiple comparison modes — line-by-line for code, word-by-word for documents, and structured comparison for JSON and CSV. Combined with syntax highlighting, unified and split views, and detailed statistics, it provides a professional-grade comparison experience without any cost or registration.