https://github.com/jort-dev/audio_splitter
Upload an MP3 file, specify a timestamp, and split it into two files: one before and one after the timestamp.
You need a mp3 file. To convert your audio file to mp3: use cloudconvert or something
The process can take a long time. A 1-hour track may take 1 hour to process.
This is because the file is processed locally, in the browser.
Proof: open the network tab of Inspect element.
Download sample .mp3