There are many online exchangers for this. To choose the most favorable conditions for convert bitcoin to cash, use the BestChange service. Here https://www.bestchange.com/bitcoin-to-dollar-cash.html you can find a list of online exchangers and information on how can you convert bitcoin to cash
BestChange monitors exchange rates in several hundred reliable exchangers and equips you with all the information you need to select the best exchanger to transfer your money.
As a big fan of different financial issues, I really like to use usd to btc which is a helpful option to invest money. It is a super method because you can be always sure about the result, it is really useful for those people who want to buy crypto with a credit card.