Can it validate JSON?

Yes. Invalid JSON shows a clear error so you can fix it quickly.

Yes. Switch to minify for compact payloads and logs.

Is JSON Formatter free?

Yes. Format and validate JSON online free.

Format, validate, and minify JSON in your browser. Free private JSON formatter — no upload and no signup.

Developer

Runs entirely in your browser — files stay on your device. No upload required.

Indent

Paste or edit JSON

{
  "name": "korisa.app",
  "tools": ["json", "jwt", "uuid"],
  "fast": true,
  "meta": {
    "version": 1,
    "private": true
  }
}

Formatted · indent 2 · text view

{
  "name": "korisa.app",
  "tools": [
    "json",
    "jwt",
    "uuid"
  ],
  "fast": true,
  "meta": {
    "version": 1,
    "private": true
  }
}

Pretty-print, validate, and minify JSON for APIs, configs, and debugging. Catch syntax errors before they hit production.

Formatting is instant and private — paste JSON without sending data to a server.