JSON formatter
Pretty-print or minify a JSON value.
Format or minify JSON in the browser and see when the text is not valid JSON. Nothing is uploaded.
This stays in your browser. Nothing you type or drop here is sent to a server.
How to use this calculator
- Paste JSON and choose format or minify.
- Invalid JSON is reported instead of being rewritten.
- The text stays in this tab.
Questions
JSON formatter: is the input uploaded?
No. The page reads and writes only in this browser. There is no account and no server round trip.
What should I check before trusting the result?
Format or minify JSON in the browser and see when the text is not valid JSON. Nothing is uploaded.