That is something 3 lines of pure JavaScrit with no library dependencies could do.
Who would build such a website and company and who on earth would pay for it?
Context: at Zapier this is the standard App for Base64 conversions. One can easily just add a JS codeblock so it’s not forced on users, but still. It’s weird.
I am not really familiar why a company might pay for an api though? Maybe for geolocation purposes but I am not familiar why someone might not want to do this client side or similar