Simple URL Shortener currently supports a wide combination of characters in branded link alias letters (uppercase and lowercase) numbers, dash and underscore which can be used when you create and customize your own unique short link. We do not support any symbols or special characters in the short links.
Upper and lower case:
aB bC cD dE eF fG gH hI iJ jK kL lM mN nO oP pQ qR rS sT tU uV vW wX xY yZ z
Numbers: 0 1 2 3 4 5 6 7 8 9 10
Underscores: ( _ )