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.
Frequently asked questions
Does the JSON formatter validate my JSON? Yes — the ToolCrix JSON formatter flags invalid JSON with a clear error message showing what went wrong and where.
Is it safe to paste API responses with tokens or keys? Yes — the ToolCrix JSON formatter processes everything in your browser; payloads containing secrets or customer data are never uploaded or logged.
Can it generate TypeScript types from JSON? Yes — the ToolCrix formatter turns your JSON into ready-to-use TypeScript interfaces you can paste straight into your project.
Should I format or minify? Format in the ToolCrix tool for human-readable indentation while developing; minify to strip whitespace for production payloads and network transfer.