The most common place to exchange coins for cash is a bank. There are also companies, such as Coinstar, with kiosks in certain locations that can count your coins and exchange them for cash. However, these kiosks charge a fee.
Going to your bank is a logical starting point to get paper money for your coins. They will not charge you extra for the exchange, and many banks have a coin counter that is free to use for account holders. If you don't use an automatic coin counter, roll your coins into paper coin rolls. Doing this saves you and the teller some time, and you know exactly how much cash to expect for your coins.
Coin-counting kiosks, often found in places like supermarkets, can also count and exchange your coins. They can be convenient if your bank does not provide the service or if you do not want to roll your coins. For instance, if your coin savings are mixed in with other non-coin materials, an automatic coin counter provides an area to sort out your coins and screen out any non-coin objects during the counting process.
Kiosks charge you a fee for counting and exchanging your coins, so you will not be getting as much cash back as you would get from a regular bank if you use this method of coin exchange.