Online JSON formatter tool

Paste a messy payload and turn it into readable JSON, minified output, or a cleaner mock response for demos.

Input JSON
Formatted output
The formatted result will appear here automatically.

Need this payload to behave like an endpoint?

Turn static JSON into a reachable HTTPS URL so prototypes, demos, and client-side builds can fetch real-looking data without standing up a backend.

Host JSON for free

Format API payloads before they slow you down

Minified API responses are efficient for machines and miserable for debugging. Formatting makes payload shape, missing fields, and nested arrays easier to inspect before the data becomes a frontend bug.

  • Pretty print messy responses: Turn one-line responses into an indented structure that is easier to compare with docs, mocks, and expected schemas.
  • Validate before sharing: Catch syntax issues such as missing quotes, trailing commas, invalid escape sequences, or malformed objects before a teammate copies the payload into code.
  • Minify for static delivery: Create compact JSON for static assets, mock endpoints, embedded fixtures, and deployable examples.