Show HN: LeetGPU – Write and execute CUDA on the web, no GPU required, for free

We found that there was a significant hardware barrier for anyone trying to learn CUDA programming. Renting and buying NVIDIA GPUs can be expensive, installing drivers can be a pain, submitting jobs can cause you to wait in long queues, etc.

That's why we built LeetGPU.com, an online CUDA playground for anyone to write and execute CUDA code without needing a GPU and for free.

We emulate GPUs on CPUs using two modes: functional and cycle accurate. Functional mode executes your code fast and provides you with the output of your CUDA program. Cycle accurate mode models the GPU architecture and provides you also with the time your program would have taken on actual hardware. We have used open-source simulators and stood on the shoulders of giants. See the help page on leetgpu.com/playground for more info.

Currently we support most core CUDA Runtime API features and a range of NVIDIA GPUs to simulate on. We're also working on supporting more features and adding more GPU options.

Please try it out and let us know what you think!