YAML to TypeScript Converter
Paste a YAML document and get TypeScript interfaces — the tool parses YAML to JSON and then generates typed interfaces with nested types and array element inference.
Last updated: May 27, 2026
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Buy me a coffeeWhat is YAML to TypeScript Converter?
Many config-driven systems (Kubernetes manifests, Helm values, CI workflow files, Hugo configs) live as YAML, but the TypeScript code that consumes them needs typed interfaces. Writing the interface by hand for a large YAML file is mechanical work that scales poorly.
This tool internally parses YAML to a JSON value, then reuses the JSON-to-TypeScript generator to produce interfaces. The result is identical to what you would get by running JSON to TypeScript on the equivalent JSON, but you skip the intermediate conversion step.
How to Use YAML to TypeScript Converter
Paste a YAML document into the input panel.
Set the root interface name.
Copy the generated TypeScript interfaces into your project.
Common Use Cases
- Typing a Kubernetes manifest or Helm values file for a TypeScript build tool.
- Generating interfaces for a CI/CD workflow YAML.
- Adding type safety to code that reads a YAML config.
- Producing OpenAPI-style schemas from YAML examples.
Example Input and Output
A small YAML mapping becomes a TypeScript interface.
name: Alice
age: 30
active: true
tags:
- admin
- activeexport interface Root {
name: string;
age: number;
active: boolean;
tags: string[];
}Privacy
All YAML parsing and TypeScript generation happen in your browser. No content is sent to a server.
YAML coverage
The internal YAML parser handles the common subset: mappings, sequences, scalars, multi-line strings via |, and !!str / !!int implicit typing. Edge cases like anchors, aliases, and tags may not be supported.
Frequently Asked Questions
How is this different from YAML to JSON + JSON to TypeScript?
It is the same pipeline, combined into one step. The intermediate JSON is not shown — useful when you only need the final TypeScript output.
How are heterogeneous arrays handled?
The type is inferred from the first element. For arrays with mixed types (e.g. [1, "two", true]), edit the output manually to use a union or any.
Does this send my YAML anywhere?
No. All parsing happens locally in your browser.
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