JSON Formatter & Validator
Format, validate, and beautify JSON data instantly
Valid JSON
Invalid JSON
lines
chars
JSON formatter usage examples
This JSON formatter is designed for debugging APIs, cleaning up configuration files and reading JSON payloads from logs or third‑party services. You can format, validate and minify JSON in one place while keeping an eye on size and line count.
Common use cases
- Beautify and validate REST API responses returned as a single-line JSON string
- Review and adjust JSON configuration blocks used in Kubernetes, microservices or feature flags
- Paste compressed JSON from logs and expand it into a readable multi‑line structure
- Catch missing commas, quotes or brackets before copying JSON into documentation or code
Practical tips
- Paste raw JSON into the editor; validation and error messages update automatically as you type.
- Use the Format button to pretty‑print JSON, or Minify to convert it back to a compact single line.
- Use the statistics footer to see approximate line count, character count and payload size before sending data.
All JSON processing runs locally in your browser, so sensitive payloads and internal API responses never leave your device.