JSON Formatter
Prettify or minify JSON data instantly. All processing happens locally in your browser.
How to Format JSON Online?
Paste Your JSON
Copy and paste your JSON data into the input field. The tool accepts any valid JSON structure.
Choose Format
Click 'Prettify' for readable indented output, or 'Minify' to compress by removing whitespace.
Copy Result
Copy the formatted JSON with one click. Use prettified JSON for debugging, minified for APIs.
Why Use BrowserKits JSON Formatter?
100% Client-Side Processing
Your JSON data NEVER leaves your browser. Safe for API keys, credentials, and sensitive configuration files.
Instant Validation
Immediately detect syntax errors with clear error messages. No waiting for server responses.
Reduce Payload Size
Use Minify to compress JSON for APIs, reducing bandwidth usage and improving performance.
Completely Free
No limits, no registration, no hidden fees. Format unlimited JSON data.
Frequently Asked Questions
Is my JSON data sent to any server?
No, absolutely not. All JSON processing happens entirely in your browser using JavaScript. Your data never leaves your device - you can verify this by disconnecting from the internet.
What's the difference between Prettify and Minify?
Prettify adds indentation and line breaks for human readability. Minify removes all unnecessary whitespace, making JSON compact for efficient storage or API transmission.
Can I format large JSON files?
Yes, the tool handles large JSON files limited only by your browser's memory. For files over 100MB, performance may vary depending on your device.