Shimmer – Real-time meeting diagrams that run in the browser

Shimmer transcribes your meetings and generates live Mermaid diagrams as the conversation unfolds. Speech recognition (Whisper or Voxtral) and diagram generation (Qwen 3.5) both run on-device via transformers.js and WebGPU. No audio leaves your browser.

You talk, it listens, and a diagram evolves in real-time. It auto-detects the best diagram type (flowchart, sequence, mindmap, timeline, ER, state, class) or you can pick one manually. A 3-step LLM pipeline runs every minute to classify the conversation, extract structure, and generate Mermaid daigrams, building on the previous version each cycle.

You can also bring your own provider and API key (OpenAI, Anthropic, Ollama) for higher quality diagram generation while keeping transcription fully local.

I built this because I found myself frequently wanting to diagram what we're talking about in work meetings at my day job. Please give it a look and let me know what you think!

P.S. The name is inspired by "shimmer" being a collective noun for a group of mermaids.

Live: https://shimmerdiagrams.com Blog post: https://dubinets.io/shimmer-launch/ Twitter/X thread: https://x.com/LevDubinets/status/2036865760686203181