Select > Install page as app (or Create Shortcut and check "Open as window").
The safest and most reliable way to achieve a portable Proton Mail experience is to use a hardened, portable web browser assigned exclusively to Proton Mail.
Using a desktop client (portable or otherwise) offers several privacy advantages over a browser: Decentralization
Even if the USB drive is stolen, the data is encrypted and useless without your password. proton mail desktop app portable
Do you need to your old emails while on the go?
It uses the browser's existing footprint and requires no admin installation privileges on many systems. 2. Unofficial Portable Apps (Use with Caution)
If you lose your USB drive, anyone who finds it could potentially access your local session data if the drive is unprotected. Select > Install page as app (or Create
If you truly need a zero-footprint solution that you can carry on a USB drive without leaving trace files on the host computer, you can run Proton's web app through a portable browser.
Plug your drive into any compatible PC and start working instantly. Does Proton Offer an Official Portable App?
If you need a solution, avoid downloading unauthorized, pre-packaged .exe files from unknown websites claiming to be the official app. These are often malware or outdated wrappers. Do you need to your old emails while on the go
A portable setup allows digital nomads, privacy advocates, and security professionals to run their dedicated email environment directly from an external storage device, such as a USB flash drive or external SSD, completely bypassing the local system's installation footprint. Why Choose a Portable Version of Proton Mail?
For users seeking a fully standalone, portable Proton Mail client, is the most mature and feature-rich solution available.
No. Bridge is a feature of paid Proton plans (Mail Plus, Unlimited, etc.). It requires an active subscription.
It requires installation via an .exe or .msi installer. It writes registry keys to Windows, stores configuration files in %APPDATA% (Local/Roaming), and creates start menu entries.