Typia is a TypeScript transformer library that generates highly optimized runtime validators and serializers directly from TypeScript types. It targets developers seeking to enforce type safety at runtime with minimal overhead, offering significant performance gains over traditional schema-based validation libraries.

How It Works

Typia leverages TypeScript's compiler API to transform type definitions into specialized runtime functions. For instance, typia.createIs<T>() is compiled into a dedicated type-checking function tailored specifically for type T. This approach eliminates the need for separate schema definitions, allowing developers to use pure TypeScript types for validation and serialization, resulting in faster execution and reduced boilerplate.

Quick Start & Requirements

• Install via npm: npm install typia
• Requires Node.js and TypeScript.
• Official Playground: 💻 https://typia.io/playground
• Documentation: 🏠 Home

Highlighted Details

• Runtime validators are claimed to be 20,000x faster than class-validator.
• JSON serialization is claimed to be 200x faster than class-transformer.
• Supports enhanced JSON schema, LLM function calling schemas, Protocol Buffers, and random data generation.
• Integrates with frameworks like NestJS and tRPC.

Maintenance & Community

• Sponsored by several individuals and organizations.
• Re-distributes half of donations to core contributors.
• Mentions nonara/ts-patch and ryoppippi/unplugin-typia as related projects.

Licensing & Compatibility

• The README does not explicitly state a license. However, the presence of "Sponsors" and the nature of the project suggest it is likely open-source, possibly under a permissive license. Further clarification on licensing is recommended for commercial use.

Limitations & Caveats

• The project's performance claims are significant and should be independently verified.
• The lack of an explicitly stated license in the README requires investigation for commercial adoption.