quicktype ☆

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Description:
Generate types and converters from JSON, Schema, and GraphQL

Type: Formula | Latest Version: 23.2.6@0 | Tracked Since: Dec 24, 2025

Links: Homepage | GitHub | Docs | formulae.brew.sh

Stars: 13,527 | Forks: 1,164 | Language: TypeScript | Category: Developer tools

Tags: code-generation types json schema developer-tool

Install: brew install quicktype

About:
quicktype is a command-line tool and library that automatically generates strongly-typed code and serialization/deserialization converters from JSON, JSON Schema, GraphQL schemas, and TypeScript interfaces. It supports a wide range of target languages including TypeScript, Swift, Kotlin, C#, Go, and more, ensuring type safety and reducing boilerplate. Its main value is accelerating development by automating the creation of type definitions and data validation code from API specifications and sample data.

Key Features:

Generates types and serializers for over 20 programming languages
Infers types from JSON samples, JSON Schema, GraphQL, and TypeScript
Command-line interface, Node.js library, and web app for ease of use
Produces clean, idiomatic code with validation logic
Supports customization via type annotations and transformation rules

Use Cases:

Generating client SDKs and model classes from API JSON responses or OpenAPI specs
Creating type-safe data models for mobile apps (Swift/Kotlin) from backend schemas
Converting between different data formats (e.g., JSON to XML) with structured type definitions

Alternatives:

json-schema-to-typescript – Focuses only on TypeScript from JSON Schema; quicktype supports more languages and input formats
OpenAPI Generator – Specializes in full client/server code from OpenAPI specs; quicktype is more lightweight for pure type generation from various sources

Version History

Detected	Version	Change	Commit
Dec 24, 2025 9:55pm	23.2.6	VERSION_BUMP	ca1450f7
Nov 10, 2024 4:33pm		VERSION_BUMP	58d6c166
Sep 12, 2024 12:05pm		VERSION_BUMP	047f874a