JSON Formatter & Validator
Format, validate, minify and inspect JSON with readable error messages.
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How to use the JSON Formatter & Validator
- Open the JSON Formatter & Validator.
- Enter your input in the fields provided - results update as you type where practical.
- Use Copy or Download to take the result with you, or Reset to start again.
How it works
Parses with JSON.parse and reports the parser message. Formatting uses 2-space indentation by default; minify removes all insignificant whitespace.
Privacy note: this tool runs locally in your browser. Your input is not uploaded, stored in analytics, or placed in the page URL.
Frequently asked questions
Is the JSON Formatter & Validator free?
Yes. It is completely free, needs no account, and runs in your browser.
Is my data uploaded when I use the JSON Formatter & Validator?
No. Processing happens locally on your device. We do not upload your inputs, files or generated passwords.
How does the JSON Formatter & Validator work?
Parses with JSON.parse and reports the parser message. Formatting uses 2-space indentation by default; minify removes all insignificant whitespace.