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JSON Formatter & Validator

Use this free online JSON formatter and validator to clean up messy JSON, check for errors, and copy valid output in seconds. It is a practical tool for developers, API testing, debugging, data formatting, and working with structured JSON data directly in the browser.

Input JSON Ready

Format, validate and minify JSON in one place

This JSON formatter is built for the work that comes up constantly in APIs, web apps and integrations. Paste a payload, check if it is valid, format it for readability or minify it for cleaner transport.

Readable formatted output with consistent indentation
Fast validation when JSON parsing fails elsewhere
Minified JSON when you want a smaller payload or cleaner copy output

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FAQ

Can I validate JSON before copying it?

Yes. Use the validate button to check the syntax, then format or minify the same input if needed.

Can this tool minify JSON too?

Yes. It can prettify JSON for readability or minify it for smaller payloads.

Format JSON before you debug or share it

Raw JSON becomes much easier to read once spacing and indentation are fixed. That helps when you are checking payloads, request bodies, config files or API responses and want to spot structure errors faster.

Validation saves time before data reaches production

A validator helps you catch syntax issues early, especially missing commas, stray quotes or broken nesting. That can save time in local testing, API work and handoffs between developers and non-developers.

Example

Example: paste a compressed API response, beautify it for review, then minify it again when you need a compact version.