JSON Formatter & Validator

Format, validate, minify and beautify JSON data. Instantly check if your JSON is valid and view it in a readable format.

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How It Works

This tool parses your JSON input using the browser's native JSON.parse() method, which strictly follows the ECMA-404 standard. All processing happens entirely in your browser — no data is sent to any server.

• Format — parses the JSON and re-serializes it with consistent indentation (2 or 4 spaces)
• Minify — removes all whitespace to produce the smallest possible output
• Sort Keys — recursively sorts all object keys alphabetically, useful for comparing JSON objects
• Validate — checks syntax without producing output, reports the exact error position if invalid
• Tree View — renders a collapsible tree for visual exploration of nested structures

About JSON

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of JavaScript but is language-independent.

JSON Syntax Rules

• Data is in name/value pairs: "name": "value"
• Data is separated by commas
• Curly braces hold objects: { }
• Square brackets hold arrays: [ ]
• Strings must use double quotes: "text"
• Values can be: string, number, object, array, true, false, or null

Common Use Cases

• APIs — REST and GraphQL APIs use JSON for requests and responses
• Configuration — package.json, tsconfig.json, .eslintrc.json and many more
• Data Storage — NoSQL databases like MongoDB and CouchDB use JSON-like formats
• Data Exchange — Widely used for transmitting structured data between systems

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