JSON Formatter and Validator

Format JSON without leaving the page

Paste a compact API response, config snippet, webhook payload, or test fixture. The formatter parses it, reports syntax errors, and returns readable or minified JSON.

Use formatted output for review and debugging. Use minified output when you need a compact payload for logs, examples, or transport.

Practical examples

• Beautify a compressed API response before reading nested fields.
• Validate a JSON request body before sending it to an endpoint.
• Minify a configuration snippet after editing it in a readable format.

Good fits

• Readable API responses and webhook payloads.
• Config snippets that need a quick syntax check.
• Compact JSON for logs, docs, tests, and request bodies.

JSON formatting examples

• Turn {"status":"ok","items":[1,2]} into indented, readable JSON.
• Minify formatted JSON before copying it into a compact request body.
• Find syntax problems such as trailing commas, missing quotes, and mismatched braces.

Related data tools

If you only need syntax checking, use the JSON Validator. For nested payloads, open the JSON Viewer; for two versions, use JSON Compare. If your JSON started as a table, try the CSV to JSON Converter, or export an array with the JSON to CSV Converter.

FAQ

Is the JSON uploaded?

No. Formatting, minifying, and validation run in your browser.

Can it repair invalid JSON?

It reports parse errors so you can fix the input, but it does not automatically rewrite broken JSON.

What JSON problems does it catch?

It catches syntax issues such as missing quotes, trailing commas, incomplete arrays, and mismatched braces.

Can I use this as a JSON viewer?

Yes. Paste a compact response and format it to inspect nested objects and arrays more easily.

Does minifying change the JSON data?

No. Minifying removes unnecessary whitespace while keeping the same values and structure.