JSON Formatter
Format, validate & minify JSON instantly in your browser. Nothing is sent.
Paste JSON above and hit Format.
Private by architecture: this tool runs entirely in your browser. Nothing is uploaded anywhere.
Questions, answered.
Is my JSON sent to a server?
No. Parsing and formatting happen locally in your browser, which makes it safe for API keys and private payloads.
What does the validator check?
Strict JSON syntax — it will point out trailing commas, unquoted keys, and other common errors with a clear message.