Browser-side utility

JSON Validator & Formatter

Validate JSON syntax, pretty-print with 2 or 4 spaces, or minify JSON payloads cleanly.

Input JSON

Valid Formatted Output

{
  "platform": "ZuniExpert",
  "tools": [
    "json",
    "dns"
  ]
}

How It Works

Paste JSON into the input box, choose your formatting mode, and inspect syntax diagnostics or copy the formatted output.

Does this support large JSON payloads?: Yes, processing happens locally in your browser memory.