Unminify JSON Online — Restore Readable JSON

Unminify minified JSON instantly with our free tool. Restore readable formatting from one-line payloads with detailed structural stats — all locally in your browser.

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JSON Unminification

Unminify and prettify compressed JSON online. Restore readable formatting with stats.

Features

Restore the readability of your minified JSON code by adding spaces and line breaks.

Unminify

Restore the readability of your minified JSON code by adding spaces and line breaks.

Basic example

Minified JSON

{"name":"FastMinify","version":"1.0.0","description":"A fast minifier tool","features":["JavaScript minification","CSS optimization","JSON compression"]}

Formatted JSON

{
  "name": "FastMinify",
  "version": "1.0.0",
  "description": "A fast minifier tool",
  "features": [
    "JavaScript minification",
    "CSS optimization",
    "JSON compression"
  ]
}

Minification options

Beautify Options

Indentation options for Beautify and Unminify (not used by Minify)

Indentation Size

Sets the number of spaces or tabs for indentation during Beautify and Unminify

Original code

{"name":"test","value":42}

With 2 spaces

{
  "name": "test",
  "value": 42
}

With 4 spaces

{
    "name": "test",
    "value": 42
}

Difference

Beautify and Unminify both use the indentation controls in the toolbar. Minify ignores them.

Indentation Type

Use spaces or tabs for indentation during Beautify and Unminify

Original code

{"name":"test","value":42}

With spaces

{
  "name": "test",
  "value": 42
}

With tabs

{
	"name": "test",
	"value": 42
}

Difference

Spaces are more standard, tabs may be preferred according to your code conventions.

JSON Statistics

Detailed information about your JSON structure

JSON statistics are automatically calculated and displayed in the results panel after each operation (Minify, Unminify, Beautify).

Keys

Objects

Arrays

Max Depth

Strings

Numbers

Booleans

Nulls

These statistics help you understand the structure and complexity of your JSON.

Dedicated JSON tools

Beyond minify/unminify on this page, browse the full JSON tools hub: JSON validator, JSON formatter, JSON diff, JSON escape / unescape, and JSON tree viewer — all browser-local.

Need JSON in YAML, CSV or XML?

Dedicated converters now live on their own topical pages — start with JSON → YAML, JSON → CSV or JSON → XML when you intentionally change serialization formats.

JSON Validation

Before minifying or formatting, validate syntax with clear line/column errors. For a dedicated workflow, use our standalone JSON validator, then explore structure in the JSON tree viewer or compare payloads with JSON diff.

JSON Formatter vs Minifier — Understanding the Difference

A JSON formatter (or beautifier) adds indentation and line breaks to make JSON readable and easy to navigate — try the dedicated JSON formatter for prettify-only workflows. The minify-family beautify JSON page shares the same editor UX as other languages. A JSON minifier removes unnecessary whitespace to reduce file size for API responses. String values stay verbatim; escape embedded text via JSON escape or inspect encoding with our URL encoder and Base64 utility.