YAML Input

TypeScript Output

What is YAML to TypeScript Converter?

Need to generate TypeScript interfaces from your YAML (YAML Ain't Markup Language) data? This tool does that instantly. Perfect for creating type-safe TypeScript code from YAML configs, API schemas, or data structures. Generate interfaces, types, and type definitions automatically.

According to TypeScript documentation, type definitions make code more maintainable and catch errors at compile time. Our converter analyzes your YAML structure and generates proper TypeScript interfaces. First, validate your YAML using our YAML Validator, then convert it to TypeScript. You can also convert from other formats like JSON to YAML first if needed.

Everything happens in your browser – your YAML never leaves your computer. Convert, download, and use your TypeScript interfaces right away.

How to Use the YAML to TypeScript Converter

Follow these steps to generate TypeScript interfaces from YAML.

Paste, Upload, or Load Sample

Paste YAML into the left panel, or click Upload to load a file. Click Sample to see example telecomm subscriber YAML. Use YAML Validator first if unsure. Example:

subscriber:
  subscriberId: SUB-1001
  plan: Unlimited 5G
  dataUsage: 45.2
  status: active
  carrier: Verizon

View TypeScript Output

The right panel shows generated TypeScript interfaces. Nested objects become interfaces, keys become typed properties, arrays become typed arrays. Ready for type-safe API clients or config definitions.

Download or Copy

Click Download to save as .ts, or Copy to clipboard. Drop into your TypeScript project for type safety. Use Clear to start fresh. All processing runs in your browser.

When You'd Actually Use This

API Type Definitions

Generate TypeScript interfaces from YAML API schemas. Create type-safe API clients with proper type definitions. Perfect for OpenAPI or other YAML-based API specs.

Config Type Safety

Create TypeScript types from YAML config files. Ensure type safety when reading configs in TypeScript applications. Catch config errors at compile time.

Code Generation

Generate TypeScript code from YAML data structures. Perfect for creating type definitions, interfaces, or type-safe data models from YAML schemas.

Type-Safe Development

Add type safety to YAML-based workflows. Convert YAML configs to TypeScript types for better IDE support, autocomplete, and error checking.

Common Questions

Is my YAML data stored?

Nope. Everything happens right in your browser. Your YAML never leaves your computer – we don't even see it.

How are nested structures handled?

Each nested mapping becomes its own exported interface, named from its key (jobs gives Jobs), and the parent property uses that name. A list of mappings becomes an array of one merged item interface. Keys like runs-on that aren't valid identifiers are quoted.

Are types inferred correctly?

We do our best to infer types from your YAML structure. Strings, numbers, booleans, arrays, and objects are all handled. You may need to manually adjust some types for complex cases.

Can I use the generated TypeScript?

Yes. The generated TypeScript code is valid and ready to use. Drop it into your TypeScript project and start using it. You may want to review and refine the types for your specific use case.

What about optional properties?

When a list holds several mappings, their keys are merged into one interface, and a key that's missing from some items is marked as an optional property with ?. Everything else is required. A null value is typed null; widen it by hand if you know the real type.

Does it work with large YAML files?

Yep. Since everything happens in your browser, it depends on your device. Small to medium YAML structures convert instantly. Really huge structures might take a few seconds.

Other YAML Tools You Might Need

Conversion is just one YAML task. Here are other tools that work well together: