{ } JSON Workbench0 network requests. Check DevTools

"JSON Beautifier":{ }

Paste minified or messy JSON and get clean, indented, syntax-colored output that's easy to read. Non-standard input is auto-repaired first. Runs 100% in your browser: zero network requests, so your data never leaves the page.

What is a JSON beautifier?

A JSON beautifier (also called a prettifier or pretty-printer) takes compact or hand-mangled JSON and lays it out with clean indentation and syntax colors so you can actually read it. It is the inverse of a minifier. Use it to inspect an API response, review a config file, or clean up JSON before committing it. This beautifier runs in your browser, so payloads with tokens or personal data never leave your machine, and it auto-repairs messy input so even LLM output or copy-pasted dicts format cleanly.

Beautify, validate, or explore?

  • Beautify: readable, syntax-colored output you can copy. This page.
  • Validate: a strict pass/fail with the exact error location: JSON Validator.
  • Explore: collapse and search a big document as a tree: JSON Viewer.

How to use

  1. Paste JSON (minified, messy, or one long line) into the Input pane.
  2. The beautified output, pretty-printed with 2-space indentation and syntax colors, appears instantly.
  3. Non-standard input (single quotes, trailing commas, comments) is auto-repaired first.
  4. Copy the readable result. Your input is never modified.
  5. Runs entirely in your browser; verify zero network calls in DevTools.

Examples

Minified → beautified

Input
{"id":42,"name":"workbench","tags":["json","diff"],"nested":{"active":true}}
Output
{
  "id": 42,
  "name": "workbench",
  "tags": [
    "json",
    "diff"
  ],
  "nested": {
    "active": true
  }
}

One long line → indented

Input
[{"a":1},{"a":2}]
Output
[
  {
    "a": 1
  },
  {
    "a": 2
  }
]

Messy input repaired, then beautified

Input
{ 'name': 'api', active: True }
Output
{
  "name": "api",
  "active": true
}

FAQ

What does beautifying JSON do?

It reformats compact or messy JSON into an indented, easy-to-read layout with consistent spacing and syntax colors, without changing any keys, values, or order. "Beautify", "prettify", "pretty-print", and "format" all mean the same thing.

Beautify vs. minify?

Beautifying adds indentation and newlines for humans; minifying removes them for machines and smaller size. Both produce the same parsed value.

What indentation does it use?

Two spaces, the most common convention for JSON. Arrays and nested objects are indented one level per depth.

Does beautifying change my data?

No. Only whitespace is added. The parsed value is identical to your input; only its formatting changes.

Can it beautify broken JSON?

Non-standard input (single quotes, trailing commas, comments, Python literals) is auto-repaired before formatting. Truly invalid JSON shows the exact error line and column.

Related tools