Free JSON Formatter & Validator – Beautify & Minify JSON

JSON Formatter & Validator

Beautify your JSON code, fix syntax errors, and minify data for production. A free, secure tool for developers.

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Input JSON
Formatted Output

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Why use a JSON Formatter?

JSON (JavaScript Object Notation) is the language of the web. However, APIs often return JSON in a “minified” format (single line) to save bandwidth, which makes it impossible for humans to read.

Tool Features

  • Beautify: Adds indentation and newlines to make the data readable.
  • Validate: Checks for common errors like missing commas or unclosed brackets.
  • Minify: Removes all whitespace to reduce file size for production use.

Common JSON Errors

If you get an error message, check for these common mistakes:

  • Trailing Commas: JSON does not allow a comma after the last item in a list `[1, 2,]`.
  • Single Quotes: JSON strings must use double quotes `”key”`, not single quotes `’key’`.
  • Unquoted Keys: All keys must be wrapped in quotes `{“id”: 1}`, not `{id: 1}`.

Developer Tools

DigitalOcean

Simple, scalable cloud hosting for your JSON APIs.

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Postman

The complete platform for building and testing APIs.

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JetBrains

Intelligent IDEs like WebStorm for JavaScript dev.

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