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Top 23 TypeScript Codegen Projects
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graphql-code-generator
A tool for generating code based on a GraphQL schema and GraphQL operations (query/mutation/subscription), with flexible support for custom plugins.
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SaaSHub
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orval
orval is able to generate client with appropriate type-signatures (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats. 🍺
This post walks through a pipeline where you define your data shape once as a Zod schema on the backend, and every other layer (API docs, frontend types, React Query hooks) is generated from it automatically using Orval. Change the schema, regenerate, and TypeScript tells you exactly what broke. Across the entire stack.
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openapi-ts
🌀 OpenAPI to TypeScript codegen. Production-grade SDKs, Zod schemas, TanStack Query hooks, and 20+ plugins. Used by Vercel, OpenCode, and PayPal.
Project mention: What Is DaloyJS? A Beginner-Friendly Tour of a Contract-First TypeScript Framework | dev.to | 2026-05-30Once your API has an OpenAPI spec, you can run one command and get a fully typed fetch client out of it (DaloyJS uses Hey API for this). Your frontend can call your backend with full autocomplete and type checking, and that client regenerates whenever your contract changes. Less guessing, fewer "what does this endpoint return again?" moments.
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openapi-typescript-codegen
NodeJS library that generates Typescript or Javascript clients based on the OpenAPI specification
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graphql-zeus
GraphQL client and GraphQL code generator with GraphQL autocomplete library generation ⚡⚡⚡ for browser,nodejs and react native ( apollo compatible )
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shortlink
Shortlink service (Microservice example) ⭐️ Star the repo if you like it! (by shortlink-org)
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web-codegen-scorer
Web Codegen Scorer is a tool for evaluating the quality of web code generated by LLMs.
Project mention: Ng-News 25/38: Angular + AI Developer Event, S1ngularity Strikes Again | dev.to | 2025-09-26View on GitHub
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The performance increase can be dramatic — if this is your first time seeing this technique, this video by the author of arri does a great job covering why it's fast, and how it works.
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Project mention: Show HN: Branchlet – Git Worktree TUI for Claude Code/Cursor/Codex etc. | news.ycombinator.com | 2025-08-28
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Project mention: Skir, modern alternative to Protobuf, now supports 9 languages | news.ycombinator.com | 2026-04-02
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vratix-expressjs-api-modules
Instantly build Node.js API backend services with Vratix 🚀. A collection of open-source, production-ready API modules for Express.js written in TypeScript. Supports authentication, Stripe billing, email integrations (Postmark), AWS S3 uploads, Docker configs, and more!
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Project mention: We stopped roadmap work for a week and fixed 189 bugs | news.ycombinator.com | 2025-11-23
Damn I just deleted another 29k loc https://github.com/VibesDIY/vibes.diy/pull/635
Code slows you down, always worth cleaning up. Yes, the business case is aligned with both the past bloat, and the current cleanup.
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python-ts-graphql-demo
Demo project to demonstrate how an asyncio Python project with SQLAlchemy and Strawberry can have a great typed DX on the frontend via codegen and TypeScript React hooks.
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graphql-codegen-vscode
vscode extension which runs graphql-codegen whenever you save a query/mutation
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apigen-ts
Generate a fully typed TypeScript fetch client from OpenAPI/Swagger in one file. Supports OpenAPI 2.0, 3.0, and 3.1.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
TypeScript Codegen discussion
TypeScript Codegen related posts
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Hey API – OpenAPI to TypeScript in Seconds
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Generate TanStack Query Hooks from OpenAPI: Own the Last Mile
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Stop Writing Types Twice: A Fullstack TypeScript Playbook
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Skir, modern alternative to Protobuf, now supports 9 languages
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Parsing Filter Expressions in NestJS with a Context-Free Grammar
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Tsarr: a type-safe TypeScript SDK & CLI for the Servarr ecosystem
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We stopped roadmap work for a week and fixed 189 bugs
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A note from our sponsor - SaaSHub
www.saashub.com | 9 Jun 2026
Index
What are some of the best open-source Codegen projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | graphql-code-generator | 11,253 |
| 2 | orval | 6,056 |
| 3 | openapi-ts | 4,905 |
| 4 | openapi-typescript-codegen | 3,371 |
| 5 | graphql-zeus | 1,975 |
| 6 | shortlink | 769 |
| 7 | web-codegen-scorer | 748 |
| 8 | arri | 506 |
| 9 | branchlet | 482 |
| 10 | nuxt-graphql-client | 401 |
| 11 | skir | 303 |
| 12 | contentful-typescript-codegen | 293 |
| 13 | rete-studio | 227 |
| 14 | rapini | 178 |
| 15 | The-Creator-AI | 160 |
| 16 | graphql-ts-client | 150 |
| 17 | vratix-expressjs-api-modules | 139 |
| 18 | vibes.diy | 127 |
| 19 | kubernate | 118 |
| 20 | type-predicate-generator | 102 |
| 21 | python-ts-graphql-demo | 97 |
| 22 | graphql-codegen-vscode | 71 |
| 23 | apigen-ts | 54 |
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