audio - How can I convert mp3 file to base64 encoded string -

I want to change the MP3 file which is for the base 64 encoded string & lt; Is 10MB I only got image converter, can anyone recommend any online tool to me?

In advance, look for "Binaries to Base 64" for "Base64" or "File at Base64"

For example,.

Then Data: Audio / MPEG; Base base 64,

with before raw base64 results