How can I convert MP3 file to a Base64 encoded string? [closed]

Answer 1

Use Notepad++, first select the entire file (CTRL+A)) and then use the Base64 Encode option under the plugins menu:

Answer 2

Look for "binary to base64" or "file to base64". For example, this tool.

Then precede raw base64 result with data:audio/mpeg;base64,