Typelizer

Define once in Ruby. Generate everywhere in TypeScript.

For Rails apps using Alba, AMS, Oj, or Panko serializers.

post_resource.rb

class PostResource < ApplicationResource
  include Typelizer::DSL

  attributes :id, :title, :body

  has_one :author
  has_many :comments
end

Post.tsgenerated

export interface Post {
  id: number;
  title: string;
  body: string;
  author: Author;
  comments: Array<Comment>;
}

Supports Alba, ActiveModel::Serializer, Oj::Serializer, and Panko out of the box.

Import your Rails routes as typed functions. Params are checked, paths are built -- no strings to get wrong.

Need snake_case for one app and camelCase for another? Define multiple writers, generate both at once.

Change a serializer, types regenerate. Edit routes.rb, route helpers update. Zero manual steps in development.

Turn the same serializer definitions into OpenAPI 3.0 or 3.1 component schemas for your API docs.

Configure globally, per-writer, or per-serializer. Sensible defaults, full control when you need it.