PenPage

PenPage is a free, open-source, privacy-focused note-taking application that stores your notes locally in your browser. No sign-up required — open the app and start writing.

Your data stays on your device. Notes are saved in IndexedDB, not on external servers. You own your data completely.

Key Features: • Beautiful WYSIWYG editor with full Markdown support • Folder-level encryption (AES-256-GCM) — lock sensitive notes with a password • Instant auto-save to local storage • Works offline as a Progressive Web App (PWA) • Optional Google Drive synchronization (your data, your cloud) • Organize notes with folders and workspaces • Bidirectional file sync with local .md files (File Link) • Public page sharing (Blackboard) • Mermaid diagram support • Export clean Markdown for AI prompts (ChatGPT, Claude) • Self-hostable with Docker • Completely free with no premium tier

PenPage is perfect for users who want a simple, fast note-taking experience without ads, no data collection, and no vendor lock-in.

Built with React, TypeScript. Open source: https://github.com/penpage/penpage