← ToolsConverters
Diagram board.
Draw an architecture diagram by hand — boxes, arrows, labels — or describe one in a sentence and let your own model sketch it out. Exports SVG and PNG; the board lives in your browser.
Bring your own key.
No account here, no trial key, no request routed through us and billed to us. Paste a key from a provider you already pay for, pick a model, describe the diagram — the key goes from this tab straight to that provider and dies with the tab.
OpenRouter
openrouter.ai/keysGoogle Gemini
aistudio.google.com/app/apikeyCustom (OpenAI-compatible)
any OpenAI-compatible endpoint · key is yours
Ten requests a minute per address — after that the route asks you to wait.
Provider
Sent with that one request — never stored, never logged, never in the URL.
The model returns topology and labels only — never coordinates. The client packs the graph onto a layered grid, so the result is tidy whatever the model does.
How to use.
- Start from a template or draw on the blank canvas — boxes, arrows and labels, arranged with the pointer.
- The board autosaves to this browser as you draw, so you can close the tab and come back to it.
- Export as SVG for docs, PNG at 1–3× for slides, or .excalidraw to reopen the board later.
Related tools.
Mermaid diagrams
Paste Mermaid code — flowcharts, sequence diagrams and more render live. Export SVG, PNG or JPG, transparent or themed.
Markdown to PDF
Markdown to a print-ready PDF with selectable text — styled preview, then your browser's Save as PDF. Mermaid blocks render as diagrams.
QR generator
Text, URL, phone or Wi-Fi credentials to a scannable QR. Download as PNG or SVG.