JSON Formatter — Beautify & Pretty Print JSON Online Free

What is JSON Formatter?

Format and beautify your JSON data with proper indentation. Paste raw JSON and get a clean, readable output instantly.

JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. When JSON is transmitted over networks or stored in databases, it is often minified to save bandwidth. Our JSON Formatter tool takes compressed or unformatted JSON and transforms it into a clean, indented structure with 2-space indentation, proper line breaks, and consistent formatting. This makes it easy to visually inspect nested objects, debug API responses, and prepare configuration files for version control. The formatter handles all valid JSON types including strings, numbers, booleans, null values, arrays, and deeply nested objects. Processing happens entirely in your browser using the native JSON.parse and JSON.stringify APIs, so your data remains private and never touches any server.

How to Use JSON Formatter

1. Paste or type your input into the editor on the left panel.
2. Results update automatically while you type. You can also press Ctrl+Enter to force a refresh.
3. View the result in the output panel on the right with full syntax highlighting.
4. Use Copy or Download to export the result.
5. Drag and drop .json or .txt files directly into the editor.
6. Toggle Tree View for an interactive, collapsible view of the JSON structure.

Example

{"name":"John Doe","age":30,"address":{"street":"123 Main St","city":"Springfield"},"hobbies":["reading","gaming","cooking"]}

{
  "name": "John Doe",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "Springfield"
  },
  "hobbies": [
    "reading",
    "gaming",
    "cooking"
  ]
}

Common Use Cases

• Debugging API responses by making minified JSON readable
• Preparing JSON configuration files for code review
• Formatting database exports for analysis
• Making JSON payloads readable in documentation
• Cleaning up JSON output from command-line tools

Formatted vs Minified JSON

Common Errors

• Trailing commas after the last property in an object or array are not valid JSON
• Single quotes around strings — JSON requires double quotes
• Unquoted property keys — all JSON keys must be wrapped in double quotes
• Missing commas between properties or array elements
• Comments (// or /* */) are not allowed in standard JSON

Why Use Our JSON Formatter?

• 100% client-side — your data never leaves your browser. No server processing, no data collection.
• No sign-up required — start using the tool instantly with no registration or installation.
• Keyboard shortcuts — press Ctrl+Enter to run, ? for shortcuts list, Ctrl+B to toggle sidebar.
• Persistent state — your input is automatically saved across sessions using local storage.
• IDE-style interface — Monaco Editor (the engine behind VS Code) with syntax highlighting and error detection.
• Multi-format conversion — convert between JSON, XML, CSV, and YAML without switching tools.

Frequently Asked Questions

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