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JSON Formatter / Validator

Format, validate, minify, inspect, and share JSON locally in your browser with modern controls and export options.

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Workbench

Input and controls

Client-side JSON studio

Paste a payload, validate it instantly, and export a polished preview without sending sensitive data anywhere.

Drop a .json file here orLocal only · 5 MB limit

Preview

Formatted output

Valid JSONReady to format, minify, or export.
{
  "user": {
    "id": 42,
    "name": "ToolRaven",
    "active": true
  },
  "roles": ["admin", "editor"]
}
Characters109
Keys5
Objects2
Arrays1
Strings: 2
Numbers: 1
Booleans: 1
Null values: 0

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How it works

Free online JSON formatter and validator

Paste raw JSON and click Format to add indentation, or Minify to compress it into a compact string. The validator checks syntax and reports errors with position details so you can fix missing commas, unmatched brackets, or invalid quoting.

When the input is valid, the tool displays a summary of objects, arrays, keys, strings, numbers, booleans, and null values. All parsing and formatting runs locally in your browser with zero data uploads.