works in chrome & firefox
warning! the code is a mess!
i will try my best to keep this working.
im not really interested in fixing bugs or adding features. thats why i created the repo.
uses
https://github.com/egoroof/browser-id3-writer
https://github.com/eligrey/FileSaver.js/
for chrome:
download to a folder and
chrome://extensions/ .
enable developer (mode top right) .
load unpacked .