JSON Formatter & Minifier

JSON (JavaScript Object Notation) is the lingua franca of web APIs, configuration files and data interchange. While the format itself is simple, real-world payloads are often minified on the wire, hand-edited (and broken), or deeply nested in ways that defeat the human eye. A JSON formatter restores indentation, sorts the noise out from the structure, and tells you the exact location of any syntax error so you can fix it.

This tool runs in your browser. The text you paste is never sent to a server, which makes it safe to use for API responses containing customer identifiers, internal log lines, or request bodies that hold secrets. Validation is performed live as you type — there is no "format" button to press.

1. Paste raw or minified JSON into the input panel.
2. Choose Format to indent the output with two spaces, or Minify to strip all whitespace.
3. Read the formatted output on the right. Errors include the exact character position so you can locate the broken comma quickly.
4. Click Copy to copy the result to your clipboard.

• Beautifying minified API responses while debugging in the browser network tab.
• Validating that a generated JSON Schema or OpenAPI document is well-formed before checking it in.
• Preparing config files (eslint, tsconfig, package.json) for code review.
• Compressing JSON for embedding into a URL parameter or environment variable.