JSON Validator

Catch JSON syntax errors as you type, format or minify, and convert to CSV, XML, or YAML — all in your browser.

How to use JSON Validator

1. Paste JSON and it is validated automatically as you type.
2. Errors highlight the line number and column where parsing failed.
3. Use Format for 2-space indentation, or Minify for a single compact line.
4. Pick CSV, XML, or YAML to convert the same data, then copy or download it.

Frequently asked questions

Is my JSON uploaded anywhere?

No. Validation and conversion run entirely in your browser; nothing is sent to a server.

Which JSON shapes convert to CSV?

An array of objects becomes rows with the union of keys as columns. An array of values becomes a single column, and nested values are written as JSON strings.