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Experimental In-Browser Sandboxes

Developer Playgrounds

Interactive sandbox environments to evaluate emerging client-side technologies, benchmark on-device machine learning models, and test hardware execution limits with zero server compute.

Flagship ToolWebGPU Accelerated

Local WebGPU LLM Benchmark

Run quantized open language models (SmolLM2, Qwen2.5-Coder, Llama 3.2) entirely in your browser. Measure pure decode tokens/second and time-to-first-token directly on your GPU without sending a single prompt to any backend server.

SmolLM2 360M(376 MB VRAM)Qwen2.5-Coder 1.5B(1.6 GB VRAM)Llama 3.2 1B(880 MB VRAM)
Privacy
100% In-Browser
Telemetry
Live Tok/s & TTFT
Runtimes
WebLLM & TF.js
STANDARDIZED TELEMETRYLIVE GPU PROBE
Decode Speed45 - 90 tok/s
Time to First Token120 - 350 ms
Standard Suite3 Prompts x 3 Runs
Community RanksPublic Leaderboard
Hardware acceleration via WebGPU shaders
Launch Playground