How to Convert TypeScript to Go - Complete Guide

Step 1

Input Your TypeScript Code

Start by pasting your TypeScript interfaces, types, or declarations. This is perfect when you're building a backend in Go that needs to match your frontend TypeScript models, or when migrating from a TypeScript project to Go.

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Paste directly: Copy TypeScript interfaces from your frontend code, API definitions, or shared type files

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Upload a file: Click "Upload" to select a .ts or .tsx file from your TypeScript project

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Try the sample: Click "Sample" to see how a User interface with nested types converts to Go

Example: TypeScript Interface Input

Here's a typical TypeScript interface you might use in a frontend application:

interface User {
  id: number;
  username: string;
  email: string;
  age?: number;
  isActive: boolean;
  role: "admin" | "user" | "guest";
  tags: string[];
  metadata: {
    createdAt: string;
    updatedAt: string;
  };
}

Step 2

Automatic Type Mapping & Conversion

The converter intelligently maps TypeScript types to their Go equivalents while preserving the structure and semantics of your data models:

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Type conversion: string→string, number→float64, boolean→bool, arrays→slices

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Optional fields: TypeScript optional fields (field?: type) become Go pointers (*Type) to distinguish null from zero values

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Nested objects: Automatically generates separate Go struct definitions for nested types

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Union types: String literal unions like "admin" | "user" are converted to string type in Go

Example: Generated Go Struct Output

The same interface, now as a type-safe Go struct ready for your backend:

package main

type User struct {
    Id       float64  `json:"id"`
    Username string   `json:"username"`
    Email    string   `json:"email"`
    Age      *float64 `json:"age,omitempty"`
    IsActive bool     `json:"isActive"`
    Role     string   `json:"role"`
    Tags     []string `json:"tags"`
    Metadata Metadata `json:"metadata"`
}

type Metadata struct {
    CreatedAt string `json:"createdAt"`
    UpdatedAt string `json:"updatedAt"`
}

Step 3

Customize Conversion Options

Fine-tune the generated Go code to match your project's conventions and requirements:

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JSON tags: Toggle to include or exclude JSON struct tags for serialization/deserialization

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Field naming: TypeScript camelCase is automatically converted to Go PascalCase for exported fields

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omitempty: Optional fields automatically get the omitempty tag for cleaner JSON output

Step 4

Export and Use in Your Go Project

Your Go structs are ready to use! Multiple export options make it easy to integrate into your backend:

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Copy to clipboard: One-click copying to paste directly into your Go source files

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Download as .go file: Save as a Go source file ready to add to your project

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Validation indicator: Green checkmark confirms the TypeScript was successfully parsed

Frequently Asked Questions

How does TypeScript to Go handle union types?

String literal unions (like "admin" | "user" | "guest") are converted to string type in Go. For more complex unions, the converter uses interface type. You may want to use Go's type system (like enums via const) for stricter type checking after conversion.

Can I convert TypeScript classes to Go?

The converter focuses on interfaces and types since they map more directly to Go structs. For TypeScript classes, extract the property definitions as an interface first, then convert. Methods and constructors need to be manually rewritten as Go functions or struct methods.

What about TypeScript generics like Array<T> or Promise<T>?

Basic generics like Array<string> are converted to Go slices ([]string). More complex generic types may need manual adjustment since Go's generics work differently. The converter provides a starting point that you can refine based on your specific needs.

Why are optional fields converted to pointers in Go?

In Go, pointers (*Type) allow distinguishing between "not set" (nil) and "set to zero value" (0, false, ""). This matches TypeScript's optional field behavior. For example, age?: number becomes Age *float64, so you can tell if age was omitted versus explicitly set to 0.

Is the conversion lossless?

TypeScript has more advanced type features (decorators, conditional types, mapped types) than Go. The converter provides a best-effort mapping for common patterns. Complex types, utility types, and advanced TypeScript features may need manual adjustment in the generated Go code.

Is this TypeScript to Go converter free?

Yes, completely free with unlimited conversions. No sign-up, no registration, no credit card required. Convert as many TypeScript interfaces as you need for your backend Go services.