Canon warns in the manual against using a voltage converter on their chargers. It will cause the charger to burn up. Someone borrowed my camera (T2i) and used a voltage converter in India. Charger was fried. I believe that most Canon chargers are dual voltage as was stated, and should work without a voltage converter, just need a plug adaptor.
As John stated, the charger will have a label indicating if it is designed to work around the world on 100-240 VAC 50 or 60 hertz. Everything I have purchased from Canon has this capability but check the label on your charger.
NEVER use a typical "travel converter" with electronic products unless it is specifically labeled for that use. Most travel converters are designed to work with hair dryers and other products with heaters and/or a universal motor. Electronic items like your power supply expect a fairly pure sine wave input while the simple travel converters provide a very dirty spiky output that will damage electronic items.
Electronic items require a step down transformer instead of a simple converter circuit and those get very heavy at anything over a 25 to 50 watt rating so if your travel converter is rated for several hundred to over 1,000 watts and it is lighter than a Canon EF 800 f5.6, DON'T plug anything electronic in to it 😁
Label from Canon LC-E19 charger below showing typical labeling for modern multi-voltage device:
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.