JSON Formatter & Validator
Paste messy JSON to beautify it with proper indentation, validate its syntax, or minify it. Runs entirely in your browser — nothing is uploaded.
Need an AI chatbot for your business? Build one free with Stellah.
Start freeFrequently asked questions
Is my JSON uploaded anywhere?
No. Formatting happens entirely in your browser — your data never leaves your device.
What if my JSON is invalid?
The tool shows the exact parse error and position so you can fix it quickly.
Related tools
Powered by Stellah.App — free forever, no sign-up