That is not base64, it's base62. You can tell because it only has 62 symbols. To get base64 you have to add 2 symbols that you arbitrarily select from the master "table of symbols to add to base62 to get to base64 depending on what the platform is and what characters are restricted in it" [1]. For instance you might use `@`, except in an email. Or `/`, but not in an fs path or URL.
As for base92, those symbols might all be easy to enter on your keyboard, but on international layouts the process can be quite involved indeed.
I prefer base36 for this reason. Want a compact random string? Math.random().toString(36). Watch out to prefix it with a char for settings that disallow leading digits through! (variable identifiers, css class names, etc.)
Base62 is fantastic for URL-friendly encoding. I use GUIDs for primary keys in my web app, and encode them for frontend consumption using Base62. Looks much neater and doesn't cause issues like Base64 extra characters might.
As for base92, those symbols might all be easy to enter on your keyboard, but on international layouts the process can be quite involved indeed.
I prefer base36 for this reason. Want a compact random string? Math.random().toString(36). Watch out to prefix it with a char for settings that disallow leading digits through! (variable identifiers, css class names, etc.)
[1] https://en.wikipedia.org/wiki/Base64#Variants_summary_table