Run Qwen3 8B in your browser

4.3 GB for the q4f16_1 build, in 113 files. It downloads once and stays in your browser cache, so every later visit starts straight away and works offline.

A browser with WebGPU — recent Chrome, Edge, Firefox or Safari — and about 5.6 GB of GPU memory. The tool checks your GPU, memory and free space and tells you whether Qwen3 8B fits before anything downloads.

No. Qwen3 8B runs on your own GPU inside the browser tab. The only network traffic is the one-time download of the model files from Hugging Face; your prompts and the answers never leave the device, and the chats are stored in this browser.

Start with q4f16_1 — it is the smallest download and the fastest to run. The f32 builds are larger and use more memory, but they run on GPUs without 16-bit shader support. Builds marked 1k hold a shorter conversation in exchange for less memory.

Its context window is 4k tokens. Longer conversations keep working — the oldest turns are dropped with a notice when the conversation no longer fits.

Qwen3 8B can think before it answers. Turn reasoning on in the chat settings; the thinking streams into a collapsible block above the answer and is never sent back as part of the conversation.

The weights are Apache 2.0, taken from the model card of Qwen/Qwen3-8B. Check the licence yourself before using it commercially.