ChemDeck

A flashcard study app built for organic chemistry — draw structures directly on your cards, organize them into sets, and sync everything across devices.

Live app: https://krishp1244.github.io/ChemDeck/

Features

• Flip-card flashcards with front/back text
• Freehand drawing on any card (pen, highlighter, eraser, pressure-sensitive with a stylus)
• A separate scratchpad for working out problems
• Organize cards into named sets (decks)
• Google sign-in with email confirmation and cross-device cloud sync
• Responsive layout for desktop, tablet, and mobile

Tech stack

• Vanilla HTML, CSS, and JavaScript — no framework, no build step
• Firebase Authentication (Google sign-in)
• Cloud Firestore for storage, secured with per-user Firestore rules
• HTML5 Canvas for the drawing and scratchpad features
• Hosted on GitHub Pages

Running locally

This is a static site, so there's no build step.

git clone https://github.com/Krishp1244/ChemDeck.git
cd ChemDeck
python -m http.server 8080

Then open http://localhost:8080. Sign-in and sync require your own Firebase project — update the firebaseConfig object in script.js and deploy firestore.rules to it.

Security and terms

Security posture, the September 2026 review, and how to report a vulnerability are documented in SECURITY.md. The user-facing terms, privacy notice, and cookie policy live in terms.html, served at /terms.html.

Changing terms.html materially means bumping TERMS_VERSION in script.js and the version string in terms.html together, which re-prompts every existing user once.

Feedback

Found a bug or have a feature idea? Send feedback — also linked directly in the app.