The File Extensions Database

.B4S File Extension

  • Developer by: Nullsoft
  • Category: Audio Files
  • Format: XML

What is an .B4S file?

.B4S is Winamp Playlist File

Music playlist file used by older versions of the Winamp media player; saved in an XML format and stores a list of multimedia files and associated metadata; used for saving song lists and favorite mixes.

The B4S format has been replaced by the much more common .M3U format.

Programs that open Winamp Playlist File
Nullsoft Winamp
VideoLAN VLC media player
VideoLAN VLC media player
Macgo Mac Media Player
VideoLAN VLC media player

How to solve problems with B4S files

  • Associate the B4S file extension with the correct application. On :
    Windows: Right click on any B4S file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.B4S files". Mac: Right click (or Ctrl-click) the B4S file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .B4S is Winamp Playlist File. Because only the current version supports the latest B4S file format. Search, therefore, e.g. on the Nullsoft manufacturer website after an available .B4S is Winamp Playlist File update.
  • To make sure that your B4S file is not corrupted or virus-infected, get the file again and scan it with antivirus software.