Base64 Encode Binary Data — Any Binary to Text
Quick Answer: Base64 encoding converts any binary data into ASCII text characters. This is required when binary data must be transmitted through text-only channels like JSON APIs, XML messages, or email protocols.
FAQ
Why can't I send binary data in JSON?
JSON only supports text strings, numbers, booleans, and null. Binary bytes are not valid JSON values, so they must be encoded as text using Base64.
What is the Base64 alphabet?
Standard Base64 uses A-Z, a-z, 0-9, +, and /. The = character is used for padding. Base64url replaces + and / with - and _ for URL safety.