Your ideas deserve
better than a notes app.
The solo creator's workbench for turning raw brain dumps into structured PRDs and interactive prototypes — powered by AI, connected to the tools you already love.
Connects to your favorite prototyping tools
The Pipeline
Three stages. Zero friction.
Every concept flows through a natural progression — from messy idea to structured spec to interactive prototype.
Your command center.
Track every concept from messy idea to working prototype.
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PRDs
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Pipeline Overview
AI-Powered Recipe Finder
Fitness Tracking Dashboard
Social Media Analytics
E-commerce Checkout Flow
Why Concept Sandbox
Built for creators who ship alone.
One connected system
Ideas, PRDs, and prototypes live together. No more scattering your work across Notion, Google Docs, and Figma.
AI at every step
Claude, GPT-4, and Gemini work alongside you — extracting structure from chaos, generating docs, scaffolding code.
Zero team overhead
No sprint planning. No permission matrices. Just you, your ideas, and the shortest path to a working prototype.
Features
Everything you need. Nothing you don't.
Built specifically for solo creators who want to move fast without the bloat of team collaboration tools.
AI Brain Dump
Type your messy, half-formed thoughts. AI automatically extracts a clean title, concise summary, and searchable tags from the chaos.
Multi-Model AI
Choose between Claude, GPT-4, and Gemini for each task.
One-Click PRD
User stories, requirements, and acceptance criteria — instantly.
Export Anywhere
Download as Markdown or PDF. Share via link.
Prototype Generation
React + Tailwind scaffolding, generated directly from your PRD.
Pipeline Dashboard
Track every concept from raw idea to working prototype. Stat cards, donut charts, and activity feeds show your progress at a glance.
Testimonials
Loved by independent builders.
“It replaced my messy Notion docs and 5 different Figma files. Now my ideas actually turn into code.”
“The AI PRD generator alone saves me hours of staring at a blank page. The UI scaffolding is just magic.”
“Finally, a tool built for the solo workflow. I went from a vague idea to a deployed prototype in one afternoon.”