To scan a QR code, you'll need a QR code reader app installed on your phone. There are many QR code reader apps, and many of them are free. Visit the app store on your phone and search for QR code readers, or try one of the readers listed below.
The following QR code generators each have different features. Try more than one!
If you're creating a QR code for a link to a website, the shorter the site's URL, the simpler the code, and the easier it is to scan. Before turning a URL into a QR code, you can shorten it with one of the free services listed below. You don't have to create an account with these services to use them for link shortening, but creating an account will allow you to keep track of how many times your links are visited.
Some QR code generators, like Snap.vu, will automatically shorten your links for you, and will also track usage if you create an account.