Prompt → Diagram is a browser-based tool that generates Excalidraw diagrams from text prompts using the Gemma 4 E2B language model. The service is designed to operate entirely within the user's browser, specifically supporting desktop Chrome version 134 or higher with WebGPU capabilities. It enables users to describe any diagram in natural language, and the model produces a corresponding diagram in the Excalidraw format.
4 times. This compression allows for longer conversations to be processed within GPU memory constraints. The language model outputs compact code of about 50 tokens, rather than the much larger raw Excalidraw JSON, which typically spans around 5,000 tokens. The implementation leverages WGSL compute shaders to run the TurboQuant algorithm on the GPU, achieving generation speeds exceeding 30 tokens per second.
Prompt → Diagram requires around 3 GB of RAM and is not supported on Safari, iOS, or mobile browsers due to hardware and software limitations. The tool is presented as a demo, and a related npm package, turboquant-wasm, offers the same TurboQuant algorithm implemented in WASM+SIMD for CPU-side vector search. The platform targets users who need to quickly generate diagrams from text, such as those interested in visualizing workflows, state machines, organizational structures, or technical processes.
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In the Image generation space, Prompt → Diagram takes a focused approach. It enables users to generate diagrams from text prompts directly in the browser without server-side processing. Prompt → Diagram is a consumer product aimed at engineers, educators, and technical users needing quick diagram generation. The product is available for free. It runs on the web and embeddable surfaces.
Behind Prompt → Diagram is teamchong, and the product first shipped in 2026. The project is developed in the open on GitHub with 317 stars and 100 commits in the last 90 days. Among its 6 catalogued features are diagram generation, text-to-diagram, and webGPU acceleration.
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