JSON Formatter & Validator

Paste messy JSON to beautify, minify or validate it instantly — with clear error messages.

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How to use the JSON formatter

Why format JSON?

Beautified JSON is far easier to read and debug, while minified JSON is smaller for faster transfer in APIs and config files. Validating catches missing commas, brackets and quotes before they break your code.

Frequently asked questions

Is my data uploaded?

No — formatting and validation happen entirely in your browser.

Is it free?

Yes, completely free with no sign-up.

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