"Because even ChatGPT forgets sometimes…"

closedNote is a simple web app for saving, organizing, and re-using your best prompts, built for students, teachers, engineers, prompt engineers, prompt tutors, and even regular folks like my mum 😅.

It's the one place you can finally dump all your fire prompts without digging through old chats or screenshots. A calm home for all your creativity.

I got tired of re-engineering my "perfect ChatGPT prompts" every time I needed a particular kind of answer. Then my mum started doing the same thing (don't ask how she got into it 😭). Then my grandma. Then my classmates.

Meanwhile, prompt engineers were dropping crazy tips on X (Twitter) and Stack Overflow, but I had nowhere to store them neatly.

So, I built one. That's what closedNote is all about, a small home to make prompt saving easier for everyone. 🙂🙂

Completely open source, open to contributions, and continuously improving.

Frontend	Backend	AI/OCR	Database	Deployment
Next.js 14	Supabase	Hugging Face	PostgreSQL	Vercel
React 18	JWT Auth	TrOCR Models	RLS Policies	Auto Deploy
TypeScript	API Routes	Zephyr Chat	Real-time Sync	Edge Functions
Tailwind CSS	Storage	Tesseract.js	Migrations	Preview URLs

clean, minimal, and distraction-free, because prompts deserve peace too 😌

fully responsive, works smoothly on mobile for on-the-go creativity

closedNote runs on Supabase, which provides both authentication and secure cloud storage using Row Level Security (RLS), meaning no one can see your notes but you.

Public schema diagram showing tables and relationships used by closedNote.

Every user's data is tied to their auth.uid(). No mix-ups, no leaks.

• 🏠 Local + Cloud Storage, works offline, syncs later
• 🔍 Search & Filter, find prompts in seconds
• 🏷️ Tag System, group prompts by category or mood
• 💾 One-Click Copy, paste straight into ChatGPT, Claude, Cursor, etc.
• 🔒 Private by Default, RLS ensures your data stays yours
• 🖼️ Image to Text (OCR), turn screenshots into prompts instantly
• 🌍 Open Source Forever, fork it, remix it, teach with it

closedNote lets you turn screenshots, photos, and handwritten notes into prompts without retyping everything.

How it works:

1. You upload an image (screenshot, photo of notes, whatever)
2. The app tries to send it to Hugging Face OCR API (our planned primary engine)
3. If that fails or isn't set up yet, it falls back to Tesseract.js running right in your browser
4. The extracted text shows up, you can edit it if needed
5. One click saves it as a prompt in your library

Current Status:

Right now, Tesseract is the stable workhorse while we finalize the Hugging Face integration (API hiccups, you know how it goes). The code is structured so swapping between both or combining them later is super easy.

Why This Matters:

Ever find yourself screenshotting a great prompt from Twitter or a Discord server, then having to manually retype the whole thing? Yeah, me too. That's done now.

The Details:

When you upload an image:

• Online Mode: Sends to Hugging Face TrOCR (Microsoft's printed/handwritten models)
• Offline Mode: Falls back to Tesseract.js (runs locally, no internet needed)
• AI Refinement: After extraction, you can clean up the text with Zephyr or Mixtral chat models
• Auto-Save: Tagged with "ocr" so you can find all your screenshot-based prompts later

Debug console showing OCR processing flow and state management

What's Cool:

The architecture is built with a primary + fallback mindset. Even if Hugging Face is down, you're not blocked. Even if you're offline on a train, Tesseract still works. No single point of failure.

git clone https://github.com/aboderinsamuel/closedNote.git cd closedNote npm install cp .env.example .env.local # Add your Supabase keys inside .env.local # (Optional) Add HUGGINGFACE_API_KEY for online OCR npm run dev

Then visit 👉 http://localhost:3000

OCR Setup (Optional):

• Get a free Hugging Face token from huggingface.co/settings/tokens
• Add HUGGINGFACE_API_KEY=hf_yourtoken to .env.local
• That's it! OCR will automatically use Hugging Face when available, or fall back to Tesseract

Important Steps:

1. Click the button above or go to Vercel
2. Import your forked repository
3. Add environment variables:
   • NEXT_PUBLIC_SUPABASE_URL
   • NEXT_PUBLIC_SUPABASE_ANON_KEY
4. Deploy!

After Deployment:

• Go to your Supabase Dashboard → Authentication → URL Configuration
• Add your Vercel domain to Redirect URLs: https://your-app.vercel.app/**
• Update Site URL to: https://your-app.vercel.app

📖 Detailed deployment guide: See VERCEL_DEPLOYMENT.md

closedNote is developer-friendly:

• Uses clean React hooks and modular components
• Minimal Tailwind classes (no spaghetti CSS)
• Supabase client handles all Auth + DB calls
• Easy to self-host or extend

• ✅ Row Level Security (RLS) enabled on all tables
• ✅ Auth via Supabase (JWT-secured)
• ✅ .env.local excluded from Git (already in .gitignore)
• ✅ HTTPS enforced on production (Vercel)
• ✅ Minimal data collection — only email + prompts

closedNote is completely open source and open for amendments. The goal is to make prompt saving easier for everyone, not just developers.

If you've got ideas, dark mode, AI tag suggestions, team sharing, prompt history, whatever, you're welcome to hop in!

• Code of Conduct - Our community standards
• Roadmap - Future features and project vision
• Release Strategy - How we ship updates
• Issue Templates - Report bugs or request features
• Pull Request Template - Submit your changes

# Steps to contribute 1. Fork this repo 🍴 2. Create a branch (feature/my-new-idea) 3. Commit & push 4. Open a pull request 🚀

Built by Samuel Aboderin, Computer Engineering student at UNILAG 🇳🇬, who just got tired of losing his prompts (and decided to fix it for everyone else too).

Reach me on LinkedIn.

MIT License, use it, remix it, or improve it. Just don't lock it behind a paywall. 🙏🏽

closedNote, because your prompts deserve better than browser history. ✨