Can I convert a Canadian version of Sage 50 database to QuickBooks Online?

Visit this link

https://quickbooks.intuit.com/learn-support/en-ca/apps-integrations/transfer-import-your-data-for-free-with-intuit-data-services/01/439751#M118

I am not sure why we can find this reference in CA community but it only mentions UK version. 

You may try to utilize it. Another option, consider purchasing a 3rd party conversion service.