TypeScript output will appear here…
Why JSON to TypeScript?
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Instant
Results in milliseconds. No server round-trip — everything runs in your browser.
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Free Forever
No pricing tiers, no limits. Use it as much as you need.
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Private
Your data never leaves your device. Zero server-side processing.
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No Signup
Open the page and start converting. No account required.
Frequently Asked Questions
How do I convert JSON to TypeScript?
Paste your JSON into the input panel and click Convert. The tool parses the JSON and generates TypeScript interfaces for every nested object automatically.
Is my data sent to a server?
No. All conversion happens entirely in your browser. Your JSON never leaves your device.
Does it handle arrays and nested objects?
Yes. Arrays of primitives map to TypeScript array types. Arrays of objects generate separate interfaces. Null values become nullable types with the | null union.