Launched January 3, 2023
GPT-Migrate

GPT-Migrate

Migrate your codebase from one language or framework to another

FreeCLIOpen SourceAI6,252 impressions#172 of its week1 comment

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  • Josh Payne[maker]· 3y ago

    Hey! Josh here, maker of GPT-Migrate, now one of the top LLM projects on GitHub. Thank you for taking the time to check out the project! Code migration is a painful and arduous task. A couple weeks ago, I had to do a migration for another project I’ve been hacking on. It took a few long days, but as I migrated, tested, and debugged function after function, I started to realize that this process could be largely, if not fully, handled with today’s most powerful LLMs. Last week at a hackathon, GPT-Migrate was born. It works by creating a standardized environment (Docker), translating the code of the source project to the target language/framework, creating unit tests against the source project, testing the newly generated codebase against these, and iteratively debugging based on the error messages and logs. The most common question I hear is, “does it work with language x to language y?” My answer is: “try it!” Usually the tool will create *something* useful, even if it isn’t totally correct the first time (and with human help, it can cross the finish line). I’d encourage you to give it a shot with a codebase that you have, even if just for fun! I’d recommend using GPT-4 32k if you do. Smaller models can work but sometimes the input size can be too large. We’re currently working on an improvement here. What’s next? There are a few “boring” improvements we’ll be making, such as creating more robust unit tests, better and more benchmarks, support for more LLMs, etc. There are also a few exciting things on the horizon that you’ll need to stay tuned to hear about! (Did someone say no more devops? 👀) Cheers and happy migrating!

GPT-Migrate helps you migrate your codebase from one language or framework to another. Imagine: ◐ a Flask API -> FastAPI or Node.js ◑ ◐ a React Native app -> Swift/Android ◑ ◐ a Vue frontend -> Typescript + Next.js ◑ ...all in just a few minutes ⚡️

GPT-Migrate uses LLMs to automatically translate a codebase from one language or framework to another.

for
Developers needing to port apps between languages/frameworks quickly.
pricing
open source
license
MIT
joshpxyne/gpt-migrate 7.0k 501Pythonupdated 2 years ago
works withDockerOpenRouter APIOpenAI API

Key features

6 features of GPT-Migrate
  • Dockerized target environment — Creates a Docker container for the target language/framework automatically.
  • Dependency mapping — Detects source dependencies and selects equivalent target dependencies.
  • Iterative debugging — Runs tests and debugs migrated code with log-based suggestions.
  • Unit test generation — Generates Python unittest suites for the migrated code.
  • Customizable prompts — Allows guideline and style customizations via prompt hierarchy.
  • Multi-step control — Supports separate setup, migrate, test, or full-run steps via CLI flags.

Use cases

  • Port a Flask API to FastAPI or Node.js in minutes
  • Convert a React Native mobile app to native Swift/Android code
  • Migrate a Vue frontend to a Typescript + Next.js stack
  • Generate and run unit tests for a newly migrated codebase

GPT-Migrate vs alternatives

GPT-MigrateBuildShipFluent CILangfuseQueryPal
Best forLLM-driven codebase migrationAI-powered visual backend creationTypeScript CI/CD pipelinesLLM app analyticsSupport automation
PricingOpen sourceFreeFreeSubscriptionFree
DevHunt upvotes21181588982
LaunchedJan 2023Jan 2023Jan 2024Jan 2023Mar 2024

GPT-Migrate FAQ

What model does GPT-Migrate use by default?+

It defaults to GPT-4-32k, but you can specify any model supported by OpenRouter or OpenAI.

Do I need to install anything besides Docker?+

You need Docker and optionally Poetry for dependency management; the tool runs via a Python script.

Can GPT-Migrate test the migrated code automatically?+

Yes, it can generate unit tests and optionally run them against the original app (if you expose it) and the migrated app.

Is GPT-Migrate ready for production use?+

It is currently in alpha; it works well on simple benchmarks but may need human assistance for complex languages.

How do I specify source and target languages?+

Use the --sourcelang and --targetlang CLI flags, e.g., --targetlang nodejs.

Is there a way to guide the migration style?+

You can pass a --guidelines string to enforce stylistic rules like “use tabs, not spaces.”

Summarized by DevHunt from github.com · Sep 29, 2026. Details may change; check the official site.