Kaggle and Google colab both provide free access to GPUs powerful enough to run stable diffusion. Alternatively, you can use other people's GPUs through Stable

Kaggle and Google colab both provide free access to GPUs powerful enough to run stable diffusion. Alternatively, you can use other people's GPUs through Stable Horde or one of the free services online, though this comes with more limitations regarding image size and implemented extras like Lora and textual inversion and so on.