JSON Formatter & Validator
Paste your JSON below, then beautify, minify or validate it. Everything runs on your device.
Free online JSON formatter and validator
This JSON formatter helps you clean up messy API responses, config files and log payloads in seconds. Beautify turns compact JSON into a neatly indented, readable structure, while minify strips every unnecessary space so you can ship the smallest possible payload. Every action also validates your input and points out exactly where a syntax error is.
Your data is private
All parsing and formatting happens directly in your browser using the native JSON engine. Nothing you paste is ever sent to a server or stored anywhere — close the tab and it's gone.
Frequently asked questions
What does beautify do?
It parses your JSON and re-prints it with two-space indentation and line breaks, making nested objects and arrays easy to read.
Why did I get an error?
The tool reports the exact message from the JSON parser, such as an unexpected token or a missing comma. Fix the highlighted issue and try again.