Your Zwift ID is a unique number assigned your Zwift account. It is used by ZwiftPower and other third-party apps who connect to your Zwift data. Here are two ways to find your ID…
Via PC/MAC File System
Your Zwift ID can be found in the desktop version of Zwift by going to Documents->Zwift->CP. The folder names here (eg, “user123456” use the ID’s of every Zwifter who has ever used your computer.
If you see multiple folders and are unsure which one belongs to your account, look at the dates of the files inside the folder, which will correspond to dates you have used Zwift on this computer.
Via Any Web Browser
Log into https://my.zwift.com/, click to view the details of one of your activities, then click the gear to edit the activity or download its fit file. Hover over the “Download Fit File” button. Your ID is shown just after prod/ like so https://s3-fit-prd-uswest2-zwift.s3.amazonaws.com/prod/654321/a2e1b7f8-27610843
Getting ZwiftPower Errors? Opt in!
If you’re using the correct ID but ZwiftPower says it does not recognize your Zwift ID, this means you have not opted in to share your Zwift data with ZwiftPower. This is required due to GDPR privacy requirements. Here’s how to get it done: