Prep your sessions anywhere — no internet, no server, no problem.
Codex Cryptica is built on the browser's Origin Private File System, which means it runs entirely on your device. Open your campaign at the table, on a train, or at a remote cabin. Your notes load instantly and every edit saves locally without a network call.
The full wiki, graph, and timeline work without any internet connection after the first page load.
Notes load from your device's file system in milliseconds — no server round-trip or CDN dependency.
When you want a backup, sync your vault to Google Drive or a local folder — on your terms.
No account. No server database leaks. Just quick, private, local-first worldbuilding.
Launch Codex Cryptica