Cannot log in or open Razer Synapse

Updated: 29-Apr-2025 | Answer ID: 1620
This article outlines steps you can take if you are unable to log in or open Razer Synapse.

Razer Synapse software is designed to work without an Internet connection. If you are experiencing any network, server, Internet, or firewall issues on Razer Synapse, follow the troubleshooting steps outlined below:

  1. Search and select “Task Manager” from the Start menu.

    Start menu search

  2. Locate “RazerAppEngine”.

  3. Right-click the process and select “End Task”.

    Task manager window with end task option highlighted

  4. Disconnect the PC from the Internet.

  5. Disconnect all Razer devices that are plugged into the PC.

  6. Add “RazerAppEngine” to Windows Firewall exemptions.

    1. Search and select "Allow an app through Windows Firewall" from the Start menu.

      Start menu search

    2. Click the "Allow another app..." button.

      Allow apps to communicate through Windows Defender Firewall screen

    3. Locate or add “RazerAppEngine” to the exception list by checking both the “Private” and “Public” checkboxes.

    4. Click "Okay" to close the window.

    5. Save the changes.

  7. Restart your modem or router to refresh the Internet connection to your PC.

  8. Enable Razer Synapse again and reconnect all Razer devices.

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