1. Enter the username of your choice into the input field. It must be between 1 and 30 characters long. Of course, the shortest usernames are all taken. You can use alphanumerical characters, periods, and underscores. However, your username cannot start with a period.
2. Click on the green "Check Availability" button to see if the name is available on Instagram and if the syntax is valid.
3. Check the result.

If you want to check availability directly on Instagram (the results will be the same as with our tool), you can follow these steps:

1. Go to instagram.com and click on Sign-up
   
2. Enter your desired username. If you want to receive automatic suggestions, enter your full name as well.
3. Check for a check symbol beside your username to confirm it's available.
   

Instagram is with us for more than a decade and is one of the most popular social networks. That means that all the short usernames, including 4 letter ones, are already taken. The only option is to purchase such a short username (they are not cheap though!)