When you hit a REST API endpoint or execute a GraphQL query, the response is typically a single-line minified JSON string. Reading a 500-character single-line blob in your terminal or Postman is nearly impossible. This tool formats any API response into clean, readable JSON with proper indentation.
Formatting REST API Responses
Copy the JSON body from your browser's DevTools Network tab, Postman, or a cURL command. Paste it into the formatter and instantly get properly indented output. The formatter handles standard JSON responses from Express.js, FastAPI, Django REST Framework, Spring Boot, and any other backend framework.
GraphQL Response Formatting
GraphQL responses wrap data in a { "data": { ... } } envelope with optional "errors" and "extensions" fields. Our formatter preserves this structure while making the deeply nested query results readable. Particularly useful for Apollo Client debugging and Hasura response inspection.
Debugging Fetch & Axios Responses
When console.log(response.data) outputs a wall of text, paste it here instead. The formatter also handles responses that include stringified JSON within JSON — a common pattern in AWS Lambda and API Gateway responses where the body field contains escaped JSON.
Privacy & Security
All processing happens in your browser's local memory. Your data — whether it's API responses containing authentication tokens, Kubernetes cluster configurations, or database exports with PII — never touches any external server. JSON Studio is 100% client-side by design.