There are lots of methods that help you solve the Canon printer is offline error. Explore different steps that help you fix the problem on your own, have a quick glance at each step here:
Step 1: Reconnect your printer with Wi-Fi
Step 2: Disable the “Use Printer Offline” Option from Your PC
Step 3: Restart your printer spooler
Step 4: Update Your Canon Printer Drivers
Many steps can help you fix the Canon printer in offline error, just find the right cause and implement the solution accordingly.