Del texto al diagrama. Dibujado por IA, en tu dispositivo.
Generador gratuito de diagramas de flujo y mapas mentales con IA. Describe lo que quieres en lenguaje sencillo: un pequeño modelo en tu dispositivo escribe el código Mermaid y renderiza un diagrama limpio al instante. Sin subidas, sin registro, exporta a SVG o PNG.
De la frase al diagrama en segundos.
Un modelo de lenguaje en tu dispositivo escribe el Mermaid por ti. Tus indicaciones nunca salen del navegador.
100 % en el dispositivo y privado
La generación se ejecuta por completo en tu navegador mediante la IA integrada de Chrome o un modelo Qwen 1.5B local. Tus indicaciones nunca se envían a un servidor.
Ocho tipos de diagrama
Diagramas de flujo, mapas mentales, secuencia, clases, estados, entidad-relación, Gantt y gráficos git: elige un tipo o deja que el modelo lo deduzca de tu indicación.
Renderizado en directo mientras se genera
Mira cómo el diagrama se dibuja token a token. El Mermaid se analiza y se renderiza mientras se genera, así que ves la forma aparecer en tiempo real y luego ajustas el código directamente.
Edita, exporta, es tuyo
El código Mermaid generado es totalmente editable: ajusta cualquier nodo o conexión y exporta como SVG vectorial nítido o PNG de alta resolución hasta 4×. Nada queda detrás de un muro de pago.
Describe. Genera. Refina.
- 01
Describe tu diagrama
Escribe una frase o pega una especificación: «flujo de registro y onboarding», «esquema de base de datos de comercio electrónico», «flujo de sprint ágil». Elige un tipo de diagrama o deja que el modelo decida.
- 02
Míralo dibujarse
El modelo de tu dispositivo escribe Mermaid válido línea a línea. El lienzo lo renderiza en directo, detectando y corrigiendo los errores de sintaxis habituales mientras se genera.
- 03
Edita y exporta
Ajusta el código Mermaid directamente en el editor: añade nodos, renombra conexiones, cambia el tema. Exporta como SVG para uso vectorial o como PNG hasta 4× de resolución.
About the AI diagram generator
Diagram Studio is a free AI flowchart and mindmap generator that runs entirely in your browser. Describe what you want — a signup flow, a database schema, a sprint workflow, a release branching strategy — and a small on-device language model writes the Mermaid code, renders it live as it streams, and lets you refine the result in a code editor before exporting as SVG or PNG.
It is built for the situations where cloud diagram tools are the wrong answer: drafting a quick sequence diagram from a meeting note, generating a private ER schema for a client system you cannot put on someone else's server, or producing a publishable flowchart without signing up for anything. Nothing leaves your device.
How it works
Two engines sit behind the same interface. The first is Chrome's built-in AI (the LanguageModel API, available in Chrome 127+ and other Chromium browsers that ship Gemini Nano). It runs the model the browser already has embedded, so there is nothing to download — generation starts immediately and stays on-device. The second engine is a local Qwen2.5 1.5B model loaded through Transformers.js on WebGPU (with a WebAssembly fallback when WebGPU is unavailable). It is a one-time download of roughly 1 GB, cached by the browser for offline use afterwards.
Whichever engine runs, the output is a Mermaid code block. A small regex-based auto-fixer repairs the common slips a 1.5B model makes — unbalanced subgraph ends, missing diagram-type keywords, unclosed quotes in node labels — before the code reaches the renderer. Mermaid then parses and renders the code, with a streaming-tolerant mode that silently ignores mid-generation syntax errors and a final render that surfaces real errors with a clear message.
Diagram types and themes
Eight diagram types are supported: flowchart, mindmap, sequence, class, state, entity-relationship, Gantt and git graph. You can pin a type explicitly, or leave the selector on Auto and let the model pick the most appropriate representation from your prompt — a request about "database tables" tends to land on an ER diagram, a request about "user journey" on a flowchart, a request about "message exchange" on a sequence diagram.
Four built-in Mermaid themes (Default, Neutral, Dark, Forest) recolour the rendered diagram instantly without re-running the model. The code itself is theme-agnostic, so you can switch themes mid-edit without losing your work.
Editing and export
The Mermaid code is always exposed in an editor next to the canvas. Every keystroke re-renders the diagram live. You can rename nodes, rewire edges, add subgraphs, swap the diagram type, fix a label the model got wrong — the editor is the source of truth, not a read-only artifact.
Export supports SVG (vector, infinite resolution, ideal for web and print) and PNG at 2× or 4× raster resolution. Both are generated client-side from the rendered SVG via canvas rasterization — no server round-trip, no watermark, no account. SVG preserves interactivity and scales cleanly into a documentation site or a slide deck; PNG is the right choice when you need a single self-contained image for chat, email or a slide.
Limits & requirements
The local Qwen model needs a reasonably modern device for acceptable speed — WebGPU support matters, and 1.5B parameters still means a multi-second generation for a complex flowchart. The Chrome built-in AI path is faster when available but only exists on Chromium browsers that ship Gemini Nano. If neither is available, the tool still works as a pure Mermaid editor: write the code by hand, get live rendering and the same export options.
A 1.5B model is not a frontier model. It will occasionally produce a syntactically wrong construct that the auto-fixer cannot repair, or mislabel a node. The live editor exists precisely for this case — treat the AI output as a first draft, not a final artifact. For diagrams with strict semantic requirements (UML compliance, BPMN naming), expect to do some manual cleanup.
Privacy
Your prompt and the generated Mermaid code never leave your browser. There is no server-side generation, no logging, no analytics on the prompt content, and no account. The only network request the tool ever makes is the one-time model download from a CDN — and once the model is cached, even that goes away. The built-in AI path makes no network requests at all.