How to use String to JSON
- Enter or paste your JSON into the input field to begin.
- Tune the Mode control before you process.
- String to JSON updates the output automatically as you type.
- When it looks right, Copy to save it.
About this tool
String to JSON is a static, client-side tool with no backend. String to JSON validates and reshapes your JSON locally with no server round-trip.
Because parsing is local, sensitive payloads never leave the page. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
How do I use String to JSON?
String to JSON lets you process your input right in the browser using the Mode control, with the result shown instantly and nothing uploaded.
Does String to JSON cost anything?
No — String to JSON is completely free, with no sign-up and no hidden limits.
Does String to JSON upload my data?
No — String to JSON processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can String to JSON handle large or deeply nested JSON?
Yes. String to JSON parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Can I use String to JSON without a connection?
Yes — after the first load String to JSON runs entirely offline.