SpecCanvas

Discover, Don't Guess

Explore 60+ AI-generated variants of your application before writing a single line of code. Make informed decisions, not assumptions.

Try SpecCanvas

Traditional approach

Describe → Implement → See

(and hope it's right)

With SpecCanvas

Describe → See → Implement

(when you know it's right)

AI-Powered

The Creative Loop

From idea to validated design in hours, not weeks

Iterate Until perfect

1

AI Writes the Spec

From idea or code. AI drafts, you refine.

2

AI Generates HTML

Claude, GPT, Gemini create different implementations.

3

Compare Side-by-Side

View variants together. Rate and pick favorites.

4

Refine with AI

Discuss UX in chat. Pin what works. Regenerate.

5

Export to AI Agent

Final spec → Claude Code, Cursor, or your toolchain.

The output is an executable specification, not just HTML.

What is UI Spec?

dashboard.ui.spec

screens:
  dashboard:
    blocks:
      - id: header
      - id: content

Claude GPT Gemini

One structure, three visions. AI respects your spec, explores the rest.

500 files in your app? Spec only what you're changing.

Progressive Precision

Control how much freedom AI gets. Start broad, add detail where needed.

purpose: User dashboard

Claude

Explore

AI has full freedom. 4 wildly different results.

blocks:
  - id: avatar
    purpose: "User avatar with level badge"
  - id: streak
    purpose: "Streak counter with flame"
  - id: achievements
    purpose: "Grid of achievement badges"
  - id: quests
    purpose: "Quests with progress bars"

Claude

Intent

Blocks defined. Styling varies.

theme: "Light airy, soft shadows"
palette:
  accent: "Coral and mint"

blocks:
  - id: avatar
    columns: 4
    purpose: "XP ring pulses near level-up"
  - id: streak
    columns: 8
    purpose: "Sun icon, amber pulse if at risk"
  - id: achievements
    columns: 6
    purpose: "Pastel unlocked, dashed locked"
  - id: quests
    columns: 6
    purpose: "Click → expand, confetti burst"

Claude

Refined

Same layout, aligned styling.

Precision where you need it.

Freedom where you don't.

SpecCanvas helps you see the difference.

Start Exploring

Why SpecCanvas?

Transform your design process with AI-powered exploration

Multi-AI Exploration

Generate variants from Claude, GPT, Gemini, DeepSeek. Compare approaches, pick the best.

AI-Native Format

UI Spec is self-describing. AI reads it without instructions. No prompt engineering needed.

Executable Specs

UI Spec + Data Spec = complete context. AI agents implement your validated design.

Structure Lock

Chat AI changes your button color — and accidentally rewrites your layout. UI Spec separates structure from style. Lock what matters, explore the rest.

See it in action

From Spec to Interface

Structure locked. Style guided. Details — AI's creative choice.

Claude

GPT

Gemini

DeepSeek

Time to generate: 30 mins

Lines of spec: ~100

AI models compared: 4

What you see is what you ship. Export UI Spec to AI agent.

Ready to discover?

Stop guessing what works. Start exploring possibilities with AI.

Start Building