JSON Formatter & Validator
Format, validate, and beautify JSON data instantly. Free online JSON formatter with syntax highlighting, error detection, and minification.
How to Use the JSON Formatter
Paste your JSON data in the left panel. The tool instantly validates it and displays the formatted version on the right. Invalid JSON will show an error message with the location of the problem.
Features
- Validation — Instantly checks if your JSON is valid
- Formatting — Choose 2-space, 4-space, tab, or minified output
- Error Detection — Shows exactly where the JSON syntax error is
- Key Count — Displays the number of keys in the JSON
Frequently Asked Questions
Is this JSON formatter free to use?
Yes, completely free with no limits. No signup or account required. Your JSON data is processed entirely in your browser — nothing is sent to any server.
Does it validate JSON syntax?
Yes. The tool instantly checks whether your JSON is valid as you type. If there's a syntax error, it shows the exact error message and location so you can fix it quickly.
Is my data safe?
Absolutely. All processing happens locally in your browser using JavaScript. Your JSON data never leaves your device — no server requests, no logging, no storage.
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