Simple devise converter - No ads - No unneeded authorizations - Totally open source ...This is a simple devise converter. It does not require any permission or disturb you with ads. Supported currencies are: 'EUR', 'USD', 'CAD', 'GBP'
... But, it requires an account on currencylayer.com. This is totally free and allow the chrome extension to get up-to-date currency rates to perform conversions.
Please also note that I do not provide any guarantee on the results of conversions. They are just given as an indication.