🔒 100% Client-Side
{ } JSON Formatter & Validator
Format, validate, and minify JSON with syntax highlighting
Input JSON
Output
Format, validate, and minify JSON with syntax highlighting
All JSON processing happens in your browser. Your data never leaves your device.
No uploading or downloading. Process JSON instantly in your browser.
Once loaded, works without internet connection.
No subscriptions, no hidden costs, completely free.
This JSON formatter runs entirely in your browser using JavaScript. When you format, validate, or minify JSON data, the processing happens completely on your device. We never upload your JSON data to any server, which means your API responses, configuration files, and sensitive data remain completely private and secure.
Unlike online services that require data uploads, our client-side approach ensures zero data collection, zero server processing, and zero privacy concerns. Your JSON data never leaves your computer.
JSON (JavaScript Object Notation) is a lightweight data format commonly used for APIs. Formatting JSON makes it human-readable by adding proper indentation and line breaks, making it easier to understand and debug data structures.
Format (or prettify) adds indentation and line breaks to make JSON readable. Minify removes all whitespace to reduce file size, which is useful for production environments where smaller payload sizes improve performance.
Yes! The validator will detect syntax errors and show you exactly what's wrong, including missing brackets, trailing commas, or incorrect formatting. This helps you quickly identify and fix JSON problems.
Yes! This tool is completely free with no hidden costs or subscriptions. We believe privacy-first tools should be accessible to everyone.
We use Google Analytics to track page views for website improvement, but we never see, store, or collect your JSON data. All processing happens locally in your browser.