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JSON Formatter
Format, validate and minify JSON without leaving your browser.
Indent
Keys
Paste JSON to format or minify it.
About this JSON formatter
Paste JSON into the left pane and it is parsed as you type. Formatting adds 2-space, 4-space or tab indentation; minifying strips every byte of whitespace. Invalid JSON reports the exact line and column so you can find the missing comma or trailing bracket.
Is my data uploaded anywhere?
No. Parsing happens in your browser with the built-in JSON engine. Nothing is sent over the network, which makes this safe for API responses, tokens and config files you would not paste into a server-side tool.