Question 1

Is Base64 encryption?

Accepted Answer

No. Base64 is an encoding, reversible without any key. Storing a password or API key as Base64 provides no protection whatsoever.

Question 2

Why do non-ASCII characters break?

Accepted Answer

The classic btoa only accepts Latin-1. This tool encodes to UTF-8 first, so characters like ğ, ş or emoji survive the round trip intact.

Base64 Converter