OpenAPI to TypeScript
Generate TypeScript interfaces and types from OpenAPI specifications.
About OpenAPI to TypeScript
Paste your OpenAPI 3.0 specification (YAML or JSON) and generate TypeScript interfaces for all schemas, request bodies, and response types. Supports nested objects, arrays, enums, oneOf/anyOf/allOf combinators, nullable types, and $ref references. Output clean, ready-to-use TypeScript code.
Key Features
- Process and analyze data entirely in your browser — nothing is sent to any server
- Handles edge cases, special characters, and large inputs gracefully
- Intuitive interface designed for quick, daily developer tasks
- Keyboard-friendly workflow for power users
- Instant output with zero server round trips
- Responsive design — works perfectly on desktop, tablet, and mobile
How to Use OpenAPI to TypeScript
- 1Enter your input data in the OpenAPI to TypeScript input area above
- 2Adjust any available options or settings to match your requirements
- 3Click the action button to process your data with OpenAPI to TypeScript
- 4Copy the result to your clipboard or download it for use in your project
When to Use OpenAPI to TypeScript
OpenAPI to TypeScript is ideal for developers who need a quick, reliable way to generate typescript interfaces and types from openapi specifications. Whether you're working on a personal project, debugging production issues, or building enterprise applications, this tool saves time by handling converters tasks directly in your browser without requiring any software installation or account setup.
Common use cases include day-to-day development workflows, code reviews, API debugging, data migration tasks, and quick one-off transformations. Since all processing happens client-side, OpenAPI to TypeScript is safe to use with sensitive or proprietary data — nothing ever leaves your machine.
Frequently Asked Questions
Q.Which OpenAPI versions are supported?
OpenAPI 3.0.x is fully supported. Swagger 2.0 specs are partially supported with basic type generation.
Q.Does it generate API client code?
This tool focuses on type generation (interfaces). It does not generate fetch/axios client code.
Q.How are nullable types handled?
Properties with nullable: true generate TypeScript union types with null (e.g., string | null).
Related Articles
YAML vs JSON — Differences, Pros, Cons & When to Use Each
Compare YAML and JSON data formats side by side — syntax, readability, features, and best use cases for each.
TypeScript Interfaces vs Types — When to Use Which
Understand the differences between TypeScript interfaces and type aliases, and learn when each one is the better choice.
Related Tools
CSV to JSON
Convert CSV data to JSON arrays for APIs, databases, and applications.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
Color Code Converter
Convert between HEX, RGB, HSL, and other color formats instantly.
YAML to JSON
Convert YAML documents to JSON format with proper type handling.