Free · Browser-only · 100% Private

JSON to TypeScript Interface

Generate strongly-typed TypeScript interfaces directly from JSON API payloads or database models.

  1. 1. Paste JSON An object or array of objects. Invalid keys are quoted. Sample payload is loaded.
  2. 2. Name the root type Change Root Interface if you want a specific export name.
  3. 3. Copy TypeScript Nested objects become their own interfaces. Download the .ts file when ready.
Input · JSON
Output · TypeScript Interfaces
All conversion runs locally in your browser engine. Zero server processing or data storage.

JSON to TypeScript interface converter

Speed up frontend development by turning raw backend API payloads into clean TypeScript type declarations.

Key capabilities

Frequently asked questions

Does DataPorter upload my data to a server?

No. Every conversion runs entirely in your browser using JavaScript. Nothing you paste is sent over the network, logged, or stored anywhere.

Is DataPorter free to use?

Yes — no signup, no usage limits, and no watermarks on the output files.

What file formats can DataPorter convert between?

SQL to CSV, MongoDB to CSV, SQLite to CSV, PostgreSQL to CSV, CSV to SQL INSERT statements, YAML to TOML, and JSON to TypeScript interfaces.

Can DataPorter handle large files?

Since conversion happens in your browser's memory instead of on a server, performance depends on your device. Files up to a few tens of thousands of rows typically convert instantly; very large files may slow down the tab.

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