Paste in JSON and this prettifies, minifies or validates it — with indentation you control, syntax highlighting, and error messages that actually tell you where the problem is in plain language. Your input is treated as plain text and never executed, and it all runs locally.
JSON Formatter is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
No. Parsing, formatting and validation all happen in your browser.
Never. Input is treated strictly as text and parsed safely — no eval is used.
It guards extremely large inputs to protect performance; for multi-megabyte files, format locally in an editor.