Zoven

JSON to TypeScript

Generate TypeScript interfaces from JSON

What is the JSON to TypeScript?

The json to typescript works like this: it generates TypeScript interfaces from sample JSON, inferring types, optionality and nested structure. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the JSON to TypeScript

1. Paste the input (code, data or query).
2. Run the operation - formatting and validation are instant.
3. Read any validation message before trusting the output.
4. Copy the result into your project.

Features

• Instant client-side formatting and validation
• No telemetry on your data
• Copy-ready output with proper escaping

Common mistakes to avoid

• Using the wrong input dialect (JSON vs JSON5, cron 5 vs 6 fields)
• Copying output without checking escaping

Examples

Input	Result
{"name":"Ada","tags":[],"meta":{"x":1}}	interface Root { name: string; tags: string[]; meta: { x: number; }; }

Best used for

• Getting a reliable answer for json to typescript without installing an app
• One-off tasks done in under a minute from any device
• Checking results before committing them to something important
• Working on a phone where desktop software is unavailable

Privacy

All parsing and transformation happens locally in this tab - your code and data are not sent anywhere.

Frequently asked questions

How does it decide optional fields?

When you provide multiple JSON samples, keys missing from any sample become optional with "?" markers.

How are optional fields inferred?

When a key appears in some records but not others, the generated interface marks it optional (?) - matching how real API payloads vary.

What happens to nested structures?

Nested objects become their own named interfaces and are referenced by name, so even deep payloads produce a readable set of types rather than one giant inline blob.

More like this

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