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JSON Formatter

Format, validate, and minify JSON

JSON Formatter Online - Free & Private

Format, validate, and minify JSON data. All processing happens locally - your data never leaves your device.

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Input

Output

Formatted JSON will appear here

Quick Actions

JSON Examples

About JSON Formatter

Format, validate, and minify JSON data with ease. Perfect for developers working with APIs, configuration files, or any JSON data. All processing is done locally in your browser - your data never leaves your device for maximum privacy.

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Format, validate, and minify JSON

Make JSON easier to read, check whether it parses, or compact it for use in applications and API workflows. Always review the output before using it in production.

How to use this tool

  1. Paste or load your JSON input.
  2. Choose format, validate, or minify using the available controls.
  3. Copy the output and test it in the target application.

Supported formats and example

Formats: JSON text.

Example: Turn a compact one-line API response into indented JSON for debugging.

Frequently asked questions

Why is my JSON invalid?

Check for trailing commas, unmatched brackets, unquoted property names, and invalid string escapes.

Does formatting change the data?

Pretty-printing changes whitespace, not the parsed data; still review the output.

Should I paste secrets here?

Avoid sharing passwords, API keys, or other sensitive data in any online tool.

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