What is JSON?
JSON is a lightweight data format used to exchange structured information between APIs, servers, web apps, and developer tools.
Paste JSON and format it with consistent indentation after a short debounce delay.
Paste raw JSON into the editor.
Formatted JSON appears here after a short delay.
JSON is a lightweight data format used to exchange structured information between APIs, servers, web apps, and developer tools.
This tool parses raw JSON, validates whether it is valid, and formats it with consistent indentation so the structure is easier to read and inspect.
Use a JSON formatter when testing API responses, reviewing mock data, debugging payloads, preparing examples for documentation, or checking copied JSON before using it in code.
Paste JSON to verify that generated mock data is valid before using it in tests, demos, or API fixtures.
Convert sample JSON into TypeScript interfaces so frontend developers can type API responses and mock data quickly.
Convert JSON arrays into CSV output for download-style mock data workflows and spreadsheet inspection.