JSON Formatter & Validator
Format, beautify, validate, and minify JSON online. See errors clearly. Free, in your browser.
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Paste messy or minified JSON and get it back cleanly indented and validated, with plain error messages that point to what's wrong.
Switch between beautify and minify, and set the indentation you like. It all runs in your browser.
Frequently asked questions
Is my JSON sent to a server?
No. Formatting and validation happen entirely in your browser, so even sensitive data stays on your device.
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