The Canadian eTA is required for visa-exempt foreign nationals who are travelling to Canada by air.
Visa-exempt countries that are eligible for the Canada eTA include:
Andorra, Anguilla, Australia, Austria, Bahamas, Barbados, Belgium, Bermuda, British Virgin Islands, Brunei Darussalam, Bulgaria, Cayman Islands, Chile, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Falkland Islands (Malvinas), Finland, France, Germany, Gibraltar, Greece, Hong Kong, Hungary, Iceland, Ireland, Israel, Italy, Japan, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Monaco, Montserrat, Netherlands, New Zealand, Norway, Papua New Guinea, Pitcairn Island, Poland, Portugal, Republic of Korea, Romania, Saint Helena, Samoa, San Marino, Singapore, Slovakia, Slovenia, Solomon Islands, Spain, Sweden, Switzerland, Taiwan, Turks and Caicos Islands, UK, United Arab Emirates, Vatican City State.
Please note there may be other requirements alongside the country you’re from.