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FastDevTools
● JSON

JSON Formatter

Format and beautify unformatted or minified JSON with customizable indentation.

Processed locally. Your input stays in this browser.
Indentation Spacing:
1 line•102 chars•102 B
Formatted JSON Output
12 lines•148 chars•148 B
Read-only output

How It Works

  • 1.Paste your raw, minified, or unformatted JSON string into the input editor.
  • 2.Choose your preferred indentation spacing (2 spaces, 4 spaces, or tab).
  • 3.Copy or download the formatted, beautified JSON output instantly.

Common Use Cases

  • •Beautifying minified API response payloads for debugging.
  • •Formatting JSON logs into readable multiline structures.
  • •Standardizing JSON formatting for code commits or config files.

Frequently Asked Questions

Is my JSON data sent to any server?

No. All JSON formatting happens entirely inside your browser using standard JavaScript APIs.

What indentation options are supported?

You can choose between 2 spaces, 4 spaces, or tab indentation.

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