Welcome to the
Open Source Tools for Renesas website

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Open Source Tools for Renesas are free, user-friendly open-source toolchains for Renesas micros with free customer support across the world.


Not satisfied with just providing high-quality products, we also provide integration with the Renesas e2 studio and professional technical support for our products worldwide for free.

Register now for free and get unlimited downloads and support – it’s easy:
1. Register on our website
2. We’ll send your username and password by email
3. Login and download installers for your chosen tools
4. Run the installers
5. Develop your application using either the Renesas e2 studio or Makefiles

If you have any questions, just ask our experienced support team via this website, or talk to other users on our discussion forum.

 Do You Need Technical Support?

Please find below quick answers to the list of most common questions asked by our users:
1. Where do I find my activation code?
2. My activation code does not work, what should I do?

We have also created a dedicated area with answers to the most common technical questions. Please visit our Technical FAQ page to find out if your question is answered.

Another source of useful information is our dedicated support forum, while questions about the site functionality and general overview are usually covered in the Frequently Asked Questions area of our site.

If you cannot find the answer to your question above, please open a new support request and we will assist you promptly.

Looking for Documentation?

We have a comprehensive guide available at this link on how to get started with the open source tools. If you are looking for migration guides, please check out the Documentation menu above – there is a dedicated submenu there with information for other targets.

Technical documentation is available here, and includes answers with details to common development and technical scenarios that could emerge during development.

 Do You Need Help?

If you need help navigating through this website, registering your account or requesting support, we have prepared an easy-to-use and comprehensive User’s Guide to Open Source Tools for Renesas.

Click here to read more about what this guide contains and how it may help you.

 Get In Touch

CyberTHOR Studios Ltd. is an international software development and consultancy company, also offering consultancy services in connection with Renesas devices and software. We would be happy to discuss how we can help you.

Click here to visit our website and contact us.

 Our Community

Our growing community is formed by professionals all over the world, working in various fields of technology and different platforms. You are always welcome to register and become a part of it!

We currently have 18,737 registered users in our community.