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JSON Formatter

Beautify and pretty-print JSON with customizable indentation. Paste minified or messy JSON and get clean, readable output instantly.

Input JSON
Formatted Output

About JSON Formatter

The JSON Formatter takes compact or poorly-indented JSON and outputs a cleanly formatted version that is easy to read and navigate. Whether you received a single-line API response or just want to tidy up a config file, this tool handles it instantly in your browser.

How to Use

  1. Paste your JSON into the left textarea.
  2. Choose your preferred indentation (2 spaces, 4 spaces, or tab).
  3. Click "Format JSON" to see the beautified output on the right.
  4. Click "Copy" to copy the formatted JSON to your clipboard.

FAQ

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write and easy for machines to parse and generate. It is used extensively in APIs, configuration files, and data storage.
APIs often return minified JSON (all on one line) to save bandwidth. Formatting adds line breaks and indentation so you can easily read and understand the structure — especially useful for debugging or reviewing API responses.
No. All formatting happens entirely in your browser using JavaScript's built-in JSON.parse() and JSON.stringify() functions. Your data never leaves your device.
A parse error means your input is not valid JSON. Common causes include: trailing commas, unquoted keys, single quotes instead of double quotes, or missing brackets. Use the JSON Validator tool to find the exact error.