Free · no sign-up · browser-based
JSON Formatter & Validator
Format, validate, and minify JSON safely in your browser.
Format before you debug
Paste JSON, then format it for readability or minify it for transport. Invalid input shows the parser’s error so you can find the problem quickly.
Example
Format {"hello":"world"} to display an indented object and validate its syntax.
Privacy
Tool inputs and files are processed in this browser and are not saved to a Modu Tools account. Ordinary site analytics or ads may load separately.
Limitations
Valid syntax does not mean the data matches an application’s schema or business rules.
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