JSON Formatter & Validator
Paste messy or minified JSON and instantly beautify, minify or validate it — with clear error messages that point to the problem. Everything runs in your browser.
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About JSON formatting
JSON (JavaScript Object Notation) is the most common format for sending data between apps and APIs. A formatter makes compact JSON readable by adding indentation, while a validator checks that your JSON is correctly structured before you use it.
Is my JSON sent to a server?
No. Parsing and formatting happen entirely in your browser — your data never leaves your device.
What does "minify" do?
It removes all unnecessary whitespace to make the JSON as small as possible — useful for saving bandwidth.