Can I sort keys in nested objects as well?

Yes. The key sorting feature can recursively sort object keys at all nesting depths.

Is there a file size limit?

Because processing occurs entirely in client memory, it comfortably handles multi-megabyte JSON payloads with instant response times.

JSON Formatter & Beautifier – Format and Pretty Print JSON Online

About JSON Formatter & Beautifier

Prettify, indent, minify, sort keys alphabetically, and validate syntax with zero latency

RFC 8259 Compliant100% Client-Side

Data Flow:Input: Unformatted / Minified JSON➔Output: Beautified / Minified JSON

A JSON Formatter is an online developer utility that parses compact, minified, or disorganized JSON text and reformats it with standardized 2-space or 4-space indentation and clean structure.

The JSON Formatter and Beautifier allows you to clean up unformatted JSON payloads with customizable indentation styles (2 spaces, 4 spaces, tabs). It also offers optional key sorting (A-Z or Z-A), minification for compact transport, and syntax error detection with line-level diagnostics.

2 spaces, 4 spaces, and tab indentation styles

Recursive alphabetical object key sorting (A-Z or Z-A)

Ultra-compact minification removing all extraneous whitespace

Syntax validation with line and column error indicators

Important Note: Input must be syntactically valid JSON. If your JSON contains trailing commas, single quotes, or missing delimiters, use the JSON Repair tool first.

Strict client-side execution. Your payload is never transmitted across the network or stored in external servers.

✦

// LIVE TRANSFORMATION EXAMPLE

SAMPLE OUTPUT

Minified Payload to Beautifully Indented JSON

Transforms compact single-line server strings into cleanly indented, human-readable objects.

INPUT (json)

{"status":"ok","code":200,"data":{"user":{"id":1,"name":"Dev","roles":["admin","lead"]}}}

OUTPUT (json)

{
  "code": 200,
  "data": {
    "user": {
      "id": 1,
      "name": "Dev",
      "roles": [
        "admin",
        "lead"
      ]
    }
  },
  "status": "ok"
}