OneTimeKey
eduHund
The service has only one function – Generating random codes without saving (the one the [site](http://otk.eduhund.com/) demonstrates). We made the service more flexible and included customization in it. When prompted, you can select a specific key. For example, only letter values or only numbers. You can select the number of characters. From 4 to 32. And make this code one-time, reusable or available for some time.
