TetraKits
The TetraKits JSON Formatter runs entirely in your browser — free, private, and ready on mobile or desktop.
Overview
API responses arrive as one long line. Config files need consistent spacing before code review. A browser JSON formatter pretty-prints and validates in one step — faster than prettier in the terminal for quick checks.
How to use the json formatter
Paste JSON to format with readable indentation, minify to a single line, or catch syntax errors before they hit production — all processing runs locally in your browser.
Common use cases
Paste JSON to format with readable indentation, minify to a single line, or catch syntax errors before they hit production — all processing runs locally in your browser. Bookmark the tool for quick access during projects.
FAQ
Can this validate JSON syntax?
Yes. Invalid JSON shows an error in the status bar with a parse message.
Does formatting change the data?
No. Formatting and minifying only change whitespace — values stay identical.
Can I format large JSON files?
Browser memory limits apply. Very large files (10MB+) may slow down; split if needed.
Does it support Unicode?
Yes. UTF-8 characters in strings are preserved during format and minify.
Is this JSON formatter free?
Yes. Unlimited format and minify with no signup.
