JSON Formatter
Free online JSON Formatter and Minifier. Beautify messy JSON data for readability or minify it to reduce file size. Validate and debug JSON data instantly.
About the JSON Formatter & Validator
The JSON Formatter by Coders Kit is a fast, offline-capable tool designed to help developers read, format, and validate JSON data instantly. Whether you are debugging a complex API response or minifying a configuration file for production, this tool handles it securely without sending data to an external server.
Features
Pretty Print (Format)
Take messy, single-line JSON strings and format them into readable, multi-line structures with standard indentation. Makes spotting errors visually much easier.
Minify (Compress)
Remove all whitespace, newlines, and comments to shrink the size of your JSON payload. Perfect for optimizing data before sending it over the network.
Instant Validation
Our tool acts as a strict JSON validator. If you miss a comma or double-quote, the editor immediately flags the exact line and character causing the syntax error.
Frequently Asked Questions (FAQ)
- Is my JSON data sent to a server?
- No. All formatting, validation, and minification happen locally in your browser. We never transmit or store your JSON data on our servers, ensuring your sensitive data remains 100% private.
- Why is my JSON invalid?
- Standard JSON strictly requires double quotes (
") for keys and string values. Single quotes (') or unquoted keys (like in standard JavaScript objects) will throw an error. Also, ensure there are no trailing commas. - Can I format large JSON files?
- Yes. The editor is highly optimized to handle large payloads efficiently. Since processing happens client-side, the speed depends entirely on your device's capabilities.