Using a Forex broker as a platform to convert currencies is not possible with any broker. You can only use them for making profits sometimes because of the price difference in the base and the quote currencies. And it’s only certain currencies that are accepted by most brokers. For instance XTB accepts EUR, USD, GBP and HUF only, and that too only if the transfer is via bank or e-wallets. With cards the options get further limited to EUR, GBP and USD. Moreover, when you deposit in a currency that is different from what you have in your bank, there is an additional interest rate charged by most brokers.
Another area which might not work in your interest is when you withdraw the amount. It will have to be from your nominated bank account, where one more time you will be paying the charges of the bank. A lot of brokers don’t really charge for withdrawals, like Fxview, but as I said, you will still be liable to pay the bank for withdrawing your money.
In fact fxview does not charge for deposits, so if you ever consider forex trading as a means in itself to make some money. Some more research and you might find more brokers like them!