JSON Formatter & Validator
Turn that wall of unreadable JSON into something a human can actually parse.
lock 100% browser-based. Files never leave your device.
JSON Formatter
Why is this safe?
- check_circle Everything runs locally in your browser — nothing uploads to a server.
- check_circle Clear the page or refresh when you're done — no trace of your data stays on your device.
- check_circle Works offline once loaded, so sensitive data stays on your device.
Quick tips
- info Keep the tab open to reuse your last settings and results.
- info Download or copy your output before refreshing to keep changes handy.
- info Working with large inputs? Process them in smaller batches for top speed.
Options
Sort object keys alphabetically.
Strip JSONC comments from output.
Convert non-ASCII characters to \uXXXX.