Your browser holds your progress
Game saves use browser-local IndexedDB storage. They belong to this website, this browser profile, and this device. They are not automatically synchronized to another phone, browser, or domain. Private browsing and browser cleanup can remove stored data.
Export a backup
After the game starts, open Player options and choose Export saves. Keep the downloaded JSON file somewhere separate from browser storage. Export again after an important session so your backup reflects recent progress.
An exported backup contains save files. It does not contain the multi-gigabyte game resource cache, account credentials, or a copy of the full game.
Restore progress
Choose Import saves and select a compatible backup. The player checks its format, size, and file paths before writing. It asks before replacing matching files, so export your current progress first if you may want to return to it.
After a successful import, the player restarts and reuses downloaded resources where available. The game then reads the restored files. A backup from another version may not be compatible even if it has a similar filename.
Clear resources without clearing saves
Clear downloaded files removes the separate game resource cache. It does not intentionally delete the runtime’s save database. The browser’s own Clear site data command is broader and may remove everything, so keep an external backup before using it.