Stable Diffusion Runs Fully Offline on a Galaxy S25 Ultra via QNN NPU
carrycooldude · x · 2026-11-06
Developer carrycooldude released v1.0.0 of an on-device image generation project that runs Stable Diffusion v1.5, v2.1 and ControlNet Canny fully locally on a Galaxy S25 Ultra (Snapdragon 8 Elite Hexagon NPU) — no cloud, no internet.
Key details:
- Precompiled W8A16 QNN context binaries loaded via ONNX Runtime + QNN HTP
- Native Kotlin CLIP tokenizer with a DPM-Solver++ 2M scheduler
- 512×512 text-to-image with Canny edge control
- Code and APK open-sourced on GitHub
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