Where are my campaign files stored?

Your files are stored in your browser's Origin Private File System (OPFS), which is sandboxed storage on your computer. You can also sync them to local folders or Google Drive.

Can I host my campaign online?

Yes. Codex supports P2P guest sessions where you can host campaigns directly from your browser to your players.

100% Local-First Campaign Wiki

Local-First, Zero-Lockin RPG Campaign Wiki

True data ownership for game masters and authors.

Codex Cryptica is designed around local-first architecture. Instead of renting access to your own campaign notes from server-hosted apps, Codex saves files directly to your device via standard browser APIs, guaranteeing privacy, lifetime access, and maximum performance.

Create a Private Vault

Core Capabilities

100% Data Privacy

Your files never touch third-party servers. Your world remains confidential, protected from server shutdowns and data leaks.

OPFS Performance

Utilizes browser-native Origin Private File System for database-like speed and robust local indexing.

Zero Lock-In

Vaults are plain Markdown files with YAML metadata. Move your notes in and out of Codex Cryptica whenever you want.

RPG campaign manager Offline campaign manager Local-first worldbuilding vs World Anvil

Frequently Asked Questions

Ready to Build Your World?

No account. No server database leaks. Just quick, private, local-first worldbuilding.

Launch Codex Cryptica