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OpenDesign

Open-source, model-agnostic design tool that generates HTML/CSS/JS prototypes, presentation decks, and landing pages from a prompt, ingests design tokens from websites, GitHub repos, and Figma files, and exports to HTML, PDF, MP4, editable PPTX, and framework components (React/Vue/Svelte).

The wedge: no product today combines OSS + model-agnostic + real video export + editable PPTX from arbitrary HTML/CSS/JS. Claude Design ships all of those except open-source, model choice, actual video file export, and editable PowerPoint.

Features

  • Prompt to prototype — describe a UI, get a live iframe preview in seconds
  • Prompt to deck — describe a presentation, get scroll-snap slides with speaker notes
  • Prompt to landing page — describe a product, get a hero/features/CTA layout
  • Refine existing designs — check "Refine current design" in the prompt panel to make targeted modifications without regenerating from scratch
  • Design token ingestion — extract colors and fonts from any site URL, GitHub repo, or Figma file as W3C DTCG tokens, applied to every subsequent generation
  • Multi-provider — switch between Claude Sonnet, GPT-4o, and Gemini Flash without changing your prompt; bring your own API keys per user
  • Multi-artifact orchestration — generate a prototype, deck, and landing page together in one shot
  • Share links — publish any artifact as a public read-only URL, no login required
  • HTML export — download a self-contained ZIP (index.html + style.css + main.js)
  • PDF export — server-side Playwright render, text is selectable (not rasterized)
  • MP4 export — deterministic frame-by-frame capture via Puppeteer + HeadlessExperimental.beginFrame + virtual-clock injection + FFmpeg; CSS animations play at the correct speed
  • PPTX export — editable PowerPoint slides with real XML text boxes, speaker notes, and brand colors (not rasterized images)
  • Code handoff — export any prototype as a self-contained React (.tsx), Vue (.vue), or Svelte (.svelte) component via LLM conversion
  • Self-hostable — single docker-compose up starts everything

Architecture

┌─────────────────────────────────────────────────────────────┐
│  app/  (Next.js 16, App Router)                             │
│  ├── /api/generate            — prototype generation        │
│  ├── /api/generate/deck       — deck generation             │
│  ├── /api/generate/landing    — landing page generation     │
│  ├── /api/generate/all        — multi-artifact in one shot  │
│  ├── /api/ingest              — site URL → DTCG tokens      │
│  ├── /api/ingest/github       — GitHub repo → DTCG tokens   │
│  ├── /api/ingest/figma        — Figma file → DTCG tokens    │
│  ├── /api/export/html         — ZIP download                │
│  ├── /api/export/pdf          — Playwright PDF              │
│  ├── /api/export/pptx         — editable PowerPoint         │
│  ├── /api/export/video        — proxies to renderer         │
│  ├── /api/export/code         — React / Vue / Svelte        │
│  └── /api/artifacts/share     — public share links          │
└─────────────────────────────────────────────────────────────┘
┌─────────────────────────────────────────────────────────────┐
│  renderer/  (Express on :3001)                              │
│  Puppeteer + virtual clock + FFmpeg → MP4                   │
└─────────────────────────────────────────────────────────────┘
Layer Choice
Framework Next.js 16 (App Router)
Auth Clerk
Database / Storage Supabase (Postgres + service-role client)
LLM Vercel AI SDK v6 — Anthropic, OpenAI, Google, Ollama
Design tokens @projectwallace/css-design-tokens (W3C DTCG)
URL ingestion Playwright page capture → Wallace token extraction
GitHub ingestion GitHub REST API (no cloning needed)
Figma ingestion Figma REST API /v1/files/:key (personal access token)
PDF export Playwright (server-side, Node runtime)
PPTX export pptxgenjs (editable XML shapes, not images)
Video export Puppeteer + HeadlessExperimental.beginFrame + FFmpeg
Code handoff LLM-based conversion → React TSX / Vue SFC / Svelte 5
Styling Tailwind CSS 4 + custom watercolor design system

Getting started

Prerequisites

  • Node.js 22 (see .nvmrc)
  • pnpm (corepack enable && corepack prepare pnpm@latest --activate)
  • Docker + Docker Compose (for the video renderer and self-hosting)

1. Clone and install

git clone https://github.com/Pandemonium-Research/OpenDesign
cd OpenDesign/app
pnpm install

2. Configure environment variables

cp .env.example .env.local
# edit .env.local — see the full table below

3. Set up Clerk

  1. Create an app at clerk.com
  2. Copy Publishable Key and Secret Key into .env.local
  3. In Clerk dashboard → Webhooks → Add endpoint:
    • URL: https://your-domain/api/webhooks/clerk (use ngrok for local dev: ngrok http 3000)
    • Events: user.deleted
  4. Copy the Signing Secret (whsec_...) into CLERK_WEBHOOK_SECRET

4. Set up Supabase

  1. Create a project at supabase.com
  2. Copy Project URL, Anon Key, and Service Role Key into .env.local
  3. Run all migrations in order — paste each file into the SQL Editor, or: 
    supabase db push
    Migrations live in app/supabase/migrations/ and must be applied in order:
    • 001_init.sql — base schema (projects, artifacts, exports)
    • 002_phase2.sql — share tokens, user API keys, PPTX format
    • 003_phase3.sql — Figma key, code handoff export formats

5. Add API keys

At minimum, one LLM provider key is required:

Provider Where to get it
Anthropic (recommended) console.anthropic.com → API Keys
OpenAI platform.openai.com → API Keys
Google Gemini aistudio.google.com → API key

Keys go in .env.local as ANTHROPIC_API_KEY, OPENAI_API_KEY, or GOOGLE_GENERATIVE_AI_API_KEY. Users can also add their own keys per-account in Settings → API Keys — user keys take priority over server env vars.

6. Start the app

# Start the video renderer (needed for MP4 export only)
cd ..
docker compose up renderer -d

# Start Next.js
cd app
pnpm dev

Open http://localhost:3000.

Environment variables

Full reference — copy from app/.env.example.

Required

Variable Description
NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY Clerk publishable key (pk_test_...)
CLERK_SECRET_KEY Clerk secret key (sk_test_...)
CLERK_WEBHOOK_SECRET Clerk webhook signing secret (whsec_...)
NEXT_PUBLIC_SUPABASE_URL Supabase project URL
NEXT_PUBLIC_SUPABASE_ANON_KEY Supabase anon/public key
SUPABASE_SERVICE_ROLE_KEY Supabase service role key — never expose client-side

LLM providers (at least one required)

Variable Provider
ANTHROPIC_API_KEY Claude (default provider)
OPENAI_API_KEY GPT-4o
GOOGLE_GENERATIVE_AI_API_KEY Gemini 2.0 Flash

Optional

Variable Default Description
OPENDESIGN_PROVIDER anthropic Default provider when user has no preference
VIDEO_RENDERER_URL http://renderer:3001 URL of the video renderer service
CHROMIUM_PATH system Path to Chromium binary for PDF export
GITHUB_TOKEN (none) GitHub personal access token — raises rate limit from 60 → 5,000 req/hr for repo ingestion
FIGMA_TOKEN (none) Server-level Figma personal access token — users can also add their own in Settings → API Keys
OLLAMA_BASE_URL http://localhost:11434/v1 Ollama API base
OLLAMA_MODEL llama3.2 Ollama model name

API reference

All API routes require a valid Clerk session cookie (except webhooks, which use signature verification).

Generation

Method Route Body Returns
POST /api/generate { prompt, projectId, provider?, brandContext?, existingPrototype? } { prototype, fullHtml, artifactId }
POST /api/generate/deck { prompt, projectId, provider?, brandContext? } { deck, fullHtml, artifactId }
POST /api/generate/landing { prompt, projectId, provider?, brandContext? } { landingPage, fullHtml, artifactId }
POST /api/generate/all { prompt, projectId, provider?, brandContext? } { prototype, deck, artifactIds }

Pass existingPrototype to /api/generate to refine rather than regenerate — the LLM applies only the requested change while preserving layout, colors, and animations.

Ingestion

Method Route Body Returns
POST /api/ingest { url, projectId } { brandContext } — site URL → DTCG tokens
POST /api/ingest/github { url, projectId } { brandContext } — GitHub repo URL → DTCG tokens
POST /api/ingest/figma { url, projectId, figmaToken? } { brandContext } — Figma file URL → colors + fonts

GitHub ingestion automatically finds globals.css, variables.css, tailwind.config.*, and token JSON files in the repo. No cloning — uses the GitHub REST API.

Figma ingestion fetches the file document tree (depth 4) and extracts solid fill colors and typography styles. Uses the stored per-user token from Settings, with an optional inline figmaToken override.

Export

Method Route Body Returns
POST /api/export/html { html, css, js, title, artifactId? } application/zip
POST /api/export/pdf { html, css, js, title, artifactId? } application/pdf
POST /api/export/video { html, css, js, durationSeconds?, fps?, artifactId? } video/mp4
POST /api/export/pptx { deck, artifactId? } application/vnd.openxmlformats-officedocument.presentationml.presentation
POST /api/export/code { html, css, js, title, framework, provider? } text/plain — component source file

framework must be react (.tsx), vue (.vue), or svelte (.svelte).

Projects, artifacts, and sharing

Method Route Description
GET /api/artifacts?projectId=<id> Last 20 artifacts for a project
POST /api/artifacts/share Generate a public share token for an artifact ({ artifactId })
PATCH /api/projects/[projectId] Rename a project ({ name })
DELETE /api/projects/[projectId] Delete a project and all its artifacts
GET /api/settings/keys Get user's API key status (whether set, not the values)
POST /api/settings/keys Save or clear user's encrypted API keys (anthropic, openai, google, figma)

Supabase schema

Four tables across three migrations:

-- 001_init.sql
projects      (id, user_id, name, brand_context jsonb, created_at, updated_at)
artifacts     (id, project_id, type, document jsonb, share_token uuid unique, created_at)
exports       (id, artifact_id, format, status, error_message, created_at)

-- 002_phase2.sql + 003_phase3.sql
user_api_keys (user_id, anthropic_key, openai_key, google_key, figma_key, updated_at)

brand_context stores the full BrandContext object (sourceUrl, colors[], fontFamilies[], fontSizes[], rawCss, dtcgTokens). artifacts.type is 'prototype', 'deck', or 'landing'. All API keys are AES-256-GCM encrypted before storage. share_token being non-null makes an artifact publicly readable at /share/[token].

Video export — how it works

The renderer service launches Chrome with --enable-begin-frame-control and --deterministic-mode, injects a virtual-clock bundle that patches Date, performance.now, requestAnimationFrame, setTimeout, and setInterval, waits for document.fonts.ready, then steps through each frame by advancing the clock and calling HeadlessExperimental.beginFrame to capture a deterministic PNG. Frames are piped to FFmpeg and encoded as H.264 MP4.

CSS keyframe animations, requestAnimationFrame loops, and setTimeout-driven state all advance at exactly the correct speed regardless of server load.

Self-hosting with Docker Compose

cp app/.env.example app/.env.local
# fill in app/.env.local

docker compose up --build

Roadmap

Phase 1 — MVP ✅

  • Prompt to prototype (HTML/CSS/JS)
  • Design token ingestion from site URL
  • Multi-provider (Claude, GPT-4o, Gemini, Ollama)
  • Per-user encrypted API keys (Settings → API Keys)
  • HTML, PDF, and MP4 export
  • Self-hostable via Docker Compose

Phase 2 — Multi-artifact ✅ (partial)

  • Deck / slide artifact type + editable PPTX export
  • Landing page artifact type
  • GitHub repo design-token ingestion
  • Multi-artifact orchestration — generate prototype + deck + landing page from one prompt
  • Public share links — artifact viewable at /share/[token] with no login
  • Real-time collaboration (Yjs + Hocuspocus) — needs a separate WebSocket host

Phase 3 — Polish and frontier (in progress)

  • Figma file ingestion — REST API, extracts fills and typography; token stored in Settings
  • Code handoff — export any prototype as a React .tsx, Vue .vue, or Svelte .svelte component
  • Refinement UX — "Refine current design" mode in the prompt panel for targeted edits
  • Storybook ingestion via @storybook/csf-tools
  • Animation timeline UI + multi-scene video export
  • WebCodecs fast-path for canvas-native exports
  • Audio and <video> sync in the render pipeline
  • Web capture browser extension (scrapes a live site into a DTCG bundle)

**Phase 4 **

  • Voice-driven interaction
  • 3D / shader authoring + GPU render VM
  • Chunked distributed rendering for long videos
  • Plugin system
  • Template marketplace
  • Enterprise self-host + SSO

License

MIT — Copyright (c) 2026 Pandemonium Research. See LICENSE for details.

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Open-source, model-agnostic design tool for generating prototypes, decks, marketing pages, and exportable animations from a single prompt and design system

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animationsclaude-designclaude-design-alternativedesign-systemdesign-toolmodel-agnosticopen-sourcevideo-export

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