To apply for a visitor visa you can:
Apply online
You must have:
Access to a scanner or camera to create electronic copies of your documents to upload, and
A valid credit card to pay with
Apply online for a visa
Apply on paper
Read the instruction guide to get all the details to apply on paper.
Instruction Guide [IMM 5256]
Once you have read the guide, you can prepare your application package. You must select the country/territory from which you will be applying to get your local visa office instructions.
Select a country/territory
Permanent residents of Canada
If you have ever been granted permanent residence in Canada, you may still be a permanent resident. CIC cannot issue a permanent resident a TRV. You may instead want to apply for Travel Document (Permanent Residents Abroad). If you meet the requirements for a Travel Document, you can return to Canada as a permanent resident.
If you no longer want to be a permanent resident, or if you know you do not meet the requirements to keep your permanent resident status, you can voluntarily give up (renounce) your permanent resident status in order to apply for a TRV.