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Common problemBlizzard Battle.netWindows PC and Mac
Battle.net app can't connect
App cannot connect or stays offline
The Battle.net app fails to sign in, stays offline or keeps returning to the login screen. When Blizzard services are up, Blizzard points to the network and security software.
How to fix it
Check the BlizzardCS Twitter account for service problems.
Quit the Battle.net app completely and open it again.
Restart your modem and router.
Release and renew your IP address and flush your DNS.
Delete the Battle.net Tools folder so the app rebuilds it.
Turn off any VPN or proxy and allow Blizzard apps through your firewall.
From Blizzard Battle.net's help pages: us.support.blizzard.com, in our words. Checked on 5 November 2026. If the steps do not help, Blizzard Battle.net's own support is the next stop.
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