Format, validate, diff, and convert JSON.
JSON is the lingua franca of modern APIs. The tools tagged here help you format minified payloads, generate types from a sample, diff two responses structurally, and convert to and from sibling formats like CSV and YAML. All run client-side.
Format, validate, and beautify JSON data with syntax highlighting.
Paste JSON and get TypeScript types and interfaces instantly.
Convert between YAML and JSON bidirectionally. All processing in your browser.
Convert between CSV and JSON, with header control. Fully in-browser.
Convert between XML and JSON, or just format XML. Fully in-browser.
Generate arrays of realistic fake data for testing — users, products, addresses, and custom schemas.
Structural diff of two JSON objects — highlights added, removed, and changed keys.