JSON Prettier
Format, validate, and minify JSON in your browser. Nothing is uploaded or stored.
Is my JSON uploaded to a server?
No. All formatting and validation happens entirely in your browser, so your data never leaves your device.
Does it work with large JSON files?
Yes. Processing runs locally and handles large documents well, with validation feedback as you edit.
Can I minify JSON too?
Yes. Switch to minify mode to strip whitespace and produce a compact single-line payload.