JSON Formatter
Format, validate, and beautify JSON.
Runs in your browser · no upload
JSON input
Paste JSON, format it, then copy the clean output.
Questions
Does this JSON formatter upload my data?
No. This tool runs in your browser and does not upload your JSON to a server.
Can it validate JSON?
Yes. Invalid JSON shows a parse error so you can fix the input before copying output.
Does it change the JSON values?
No. It parses and reprints the same JSON data with readable indentation.