JSON Formatter & Validator
Pretty-print, minify and validate JSON with clear error messages.
About this tool
JSON from an API or log is often a single dense line that's painful to read. This tool reformats it with the indentation you choose, or strips all whitespace to minify it for transport.
It also validates as you type: paste anything and it confirms the JSON is well-formed or points to the syntax error. Everything runs locally, so even sensitive payloads never leave your browser.
Frequently asked questions
No. Parsing, formatting and validation all happen in your browser using the native JSON engine. Nothing is transmitted or stored.
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