Tools

JSON Formatter – Beautify & Format JSON Online

Free JSON formatter to prettify and format JSON with proper indentation. Validates JSON and highlights errors instantly.

JSON Formatter

The JSON Formatter helps you instantly format, prettify, and validate JSON data.
It’s designed for developers working with APIs, configuration files, logs, and data exports.

Proper formatting makes JSON easier to read, debug, and review—especially when working with deeply nested structures.

How to use the JSON formatter

  1. Paste your JSON into the input field.
  2. Click Format or let it auto-format.
  3. Copy the prettified JSON output.

Common use cases

  • Debug API responses
  • Read and review large JSON payloads
  • Format configuration files
  • Share readable JSON with teammates
  • Validate JSON before deployment

Tips & notes

  • Trailing commas are not valid JSON.
  • Invalid JSON will return a clear error message.
  • Use the JSON Minifier if you need compact output instead.

Related developer tools

  • JSON Minifier
  • JSON Validator
  • Base64 Encoder
  • Base64 Decoder

FAQ

Does this tool validate JSON?
Yes. Invalid JSON will show an error instead of formatted output.
Is my JSON data stored?
No. All formatting is done instantly and nothing is saved.
Does it support large JSON files?
Yes. You can format large JSON payloads where browser limits allow.
Does formatting change my data?
No. Formatting only changes whitespace and indentation.