JSON Formatter
Format, minify, and validate JSON in your browser. Invalid input shows a parser error.
Processed on your device. Inputs are not uploaded.Runs locally in a background worker
How to use
Paste JSON and choose format, minify, or sort keys. Invalid JSON shows the parser error.
Example
Format {"name":"Deck","ready":true} into readable, indented JSON.
Limitations
Standard JSON only: no comments or trailing commas. Integers outside JavaScript’s safe range may lose precision.
Privacy
Your input stays in browser memory while you use this page. It is not uploaded or saved. Downloads are saved only when you choose to save them.