Tip: Press Ctrl+Enter (or Cmd+Enter) to format quickly
Format & Beautify
Readable indented structure instantly
Validate
Detect errors with clear messages
Minify
Compress for production use
100% Private
Data never leaves your browser
Complete Guide to JSON Formatting
JSON (JavaScript Object Notation) is the most widely used data format for APIs and web applications. Our formatter makes working with JSON data fast and error-free.
Format & Beautify
Converts compact or minified JSON into a human-readable format with proper indentation and line breaks. Useful when debugging API responses or reading configuration files.
Validate JSON
Checks your JSON for syntax errors. Common issues include missing quotes on keys, trailing commas, and mismatched brackets. The validator shows the exact error message from the parser.
Minify JSON
Removes all whitespace and line breaks to produce the most compact representation. Reduces file size for production API responses and improves transfer speed.
JSON Syntax Rules
- Keys must be double-quoted strings โ
"key": "value" - No trailing commas after the last item
- Strings must use double quotes, not single quotes
- Numbers, booleans (
true/false), andnullare valid values - Arrays use
[], objects use{}
Keyboard Shortcut
Press Ctrl+Enter (Windows/Linux) or Cmd+Enter (Mac) while in the input field to format instantly without clicking the button.
Frequently Asked Questions
It parses your JSON and outputs it in a readable, indented format. It also validates the structure and reports any syntax errors with clear messages.
Minification removes all unnecessary whitespace, newlines, and indentation to produce the smallest possible JSON string. This reduces file size and is ideal for API responses in production.
Never. All processing happens in your browser using JavaScript. Your data never leaves your device and is not stored or transmitted anywhere.
The JSON specification (RFC 8259) strictly requires double quotes for both keys and string values. Single quotes are valid in JavaScript but not in JSON. This is one of the most common JSON errors.
Yes, 100% free with no registration, no limits, and no data stored.