How can I cut and trim mp3 files downloaded from youtube?

Most online MP3 cutters, including mp3cut/net, do not re-encode the audio when you select a segment to keep. Instead, they cut or trim MP3 file at the byte level, which preserves the original audio quality because no re-encoding occurs.

How it works:
  *  You upload your MP3 file to the website.
  * You visually select the section of the audio you want to keep by dragging handles on the waveform.
  * The tool then creates a new trimmed MP3 file based on your selection.

Tips:

 *   Ensure you only select the desired segment carefully on the waveform.
 *  The trimming process is typically lossless, meaning original quality stays intact.

 *  If you want to trim MP3 file from the beginning or end only, simply set the start or end points accordingly.
 *  After trimming, download the file, which will be a new MP3 with the selected part.