BRUTAL Optimizer does almost all of its work locally on your PC. After you have activated once, you can use the app on a machine with no internet connection. This page lays out exactly which features need a connection and which keep working offline.
After your first activation, the app stores your last-known license locally. When the license server can't be reached, that cached license keeps Pro features working through an offline grace window — you'll see the Offline badge state instead of Pro. When you reconnect, the app re-verifies and switches back to the normal Pro badge automatically.
These features have to reach a server, so they won't work offline:
Everything that acts on your own PC keeps working with no connection:
| Question | Answer |
|---|---|
| Will Pro stop working if I lose internet? | No — your cached license keeps Pro features running through the offline grace window. Past that window, Pro pauses until the app can re-verify; just reconnect. |
| Why does it say "Offline" instead of "Pro"? | The app couldn't reach the license server and is running on your last-known license. It returns to Pro after it re-verifies online. |
| Can I activate a new install with no internet? | No. First activation needs a one-time connection to the license server. After that the app runs offline. |
Will Pro stop working if I lose internet?
No. After activation, your cached last-known license keeps Pro features running through an offline grace window (the "Offline" badge). If you stay offline past that window, Pro pauses until the app can re-verify your license — just reconnect and it switches back automatically.
Why does the badge say "Offline" instead of "Pro"?
The app couldn't reach the license server, so it's running on your last-known license. It returns to the normal Pro badge once it re-verifies online. See /support/couldnt-check-explained for what these messages mean.
Can I activate a new install without internet?
No. Your first activation (free or Pro) needs a one-time connection to the license server. After that initial activation, the app runs offline.