JSON Formatter — Format, Validate & Minify JSON Free

JSON input

Valid JSON

Output

{
  "name": "ToolCrix",
  "tools": 11,
  "free": true,
  "tags": [
    "pdf",
    "image",
    "qr"
  ]
}

Quick answer

How to use the free JSON Formatter

To format JSON for free, paste your JSON, click Format to beautify or Minify to compress. The validator catches syntax errors, and you can generate TypeScript types — all processed locally.

Free JSON formatter & validator

Format, validate and minify JSON instantly in your browser. Beautify messy API responses, catch syntax errors, compress for production, and even generate TypeScript types — all locally, so your data and secrets never leave your machine.

How to format JSON

Paste your JSON into the input.
Click Format to beautify, or Minify to compress it.
If there's an error, the validator shows what and where.
Generate TypeScript types, then copy or download the result.

Private by design

Pasting JSON into a random tool can leak tokens, keys or customer data. Here everything is processed in your browser, so sensitive payloads stay private — no upload, no logging.

Format vs minify

Format adds indentation for humans; minify strips whitespace for the smallest file. Use format while developing and minify for production and network transfer.

Questions

Frequently asked questions

Why validate JSON?

Malformed JSON is a common cause of API failures and silent data loss. Validating catches missing commas, quotes and brackets before they break something.

What does minify do?

Minify removes all whitespace and newlines so the JSON is smaller for transfer and storage, while staying 100% valid.

Is my JSON sent to a server?

No. Formatting, validating, minifying and TypeScript generation all happen in your browser with native JavaScript.

Can it generate TypeScript types?

Yes. Paste JSON and click “TypeScript types” to get ready-to-use interfaces inferred from your data — a feature many tools charge for.

GuideJSON Formatter & Validator: How to Read and Debug JSONRead the full guide →

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