JSON Formatter & Validator
Format, validate, and minify JSON data instantly. Everything runs locally in your browser.
About JSON Formatter
This free JSON formatter tool helps developers quickly format, validate, and minify JSON data. Whether you're debugging API responses, working with configuration files, or preparing data for production, this tool handles it all.
Features
- Format/Beautify: Transform minified JSON into readable, indented format
- Validate: Check if your JSON syntax is correct with detailed error messages
- Minify: Remove whitespace to reduce file size for production
- Privacy: All processing happens in your browser - data never leaves your device
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. JSON is commonly used for APIs, configuration files, and data storage.
Common JSON Errors
- Missing or extra commas
- Unquoted property names
- Single quotes instead of double quotes
- Trailing commas after the last element
- Unescaped special characters in strings