About JSON Toolkit
JSON Toolkit is a complete online JSON editor for formatting, validating, minifying, and converting JSON data. Developers use it daily to format API responses, validate configuration files, and extract nested values without writing code.
Use it to format a minified API response for debugging, validate a configuration file before committing to version control, or convert JSON to CSV for import into a spreadsheet. The JSON-to-YAML and JSON-to-TypeScript conversions save time when migrating between formats or generating type definitions from real data.
All JSON processing runs entirely in your browser — your data never leaves your device.