USB Flasher

Get SubSave on a USB drive

Plug in a USB stick. Click flash. Hand it to a sub. That's it. Everything runs offline — no internet, no accounts, no cloud.

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Enter access password

SubSave is in private beta. Enter the password to download.

Wrong password — try again.

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Flash to USB

Plug in any USB drive (or pick an empty folder), then click Flash. The whole SubSave app installs in seconds.

⚠ Browser not supported. The flasher needs Chrome, Edge, or another Chromium-based browser on a desktop computer. Safari and Firefox don't support the File System Access API yet.
For those browsers, download a ZIP instead and copy the files onto your USB manually.

Pick USB

Confirm

Flash

Done

Selected destination

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✓

USB ready!

SubSave is installed on the drive. Eject it from your computer, then plug it into the classroom computer. Open SubSave_LAUNCH.html to start.

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What goes on the USB: a single SubSave_LAUNCH.html file (the only thing the sub clicks) and a SubSave_DO_NOT_TOUCH/ folder containing the app. Pure HTML — no installer, no admin password.

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Privacy: Files are written directly from your browser to your USB drive. Nothing is uploaded. Your files don't pass through any server.

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Empty drive recommended: Plug in a fresh or empty USB. SubSave needs only ~500 KB but coexists best with its own folder.

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How a sub uses it: Plug USB into the classroom computer, double-click SubSave_LAUNCH.html, choose Teacher / Planned Sub / Unplanned Day, and follow the setup. Everything runs offline in the browser.