B4S File Extension
Winamp Playlist Format
- File Type b4s
- Developer Nullsoft
- Popularity
- Application Winamp
- Category Document Files
- Format XML
What is a B4S file?
Winamp Playlist Format, identified by the B4S extension, is a Document Files type and includes 969 files.
The Winamp Playlist Format (B4S), created by Nullsoft, is one of file format they developed, and they also built programs to support them.
B4S file support extends to various operating systems, including Windows, Linux and Mac OS, as well as mobile devices running Android. When working with B4S files, you can rely on 3 programs, including Winamp, VLC media player and Playlist Manager.
Programs that support B4S files
Mac OS
Linux
Android
How to open a B4S file?
If you can’t open a B4S file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
When it comes to opening and working with B4S files, Winamp, VLC media player and Playlist Manager are the top choices for users. To install the updated version of Winamp, simply go to the Radionomy site and download the installer compatible with all major platforms.
Once the process is complete, Winamp should take over as the default application for B4S files.
Set Winamp as the default B4S program
Changing Default Programs in Windows
- Right-click on your B4S file, then choose the "Open with" option and select "Choose another application" from the available options;
- In the pop-up window, select the Winamp application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening B4S files.
Change Default Program on Mac
- Right click or Control + left click on the desired B4S file;
- Select "Open in application" and click "Other";
- At the bottom of the window, you will find the "Enable" menu. Default, will be set to "Recommended Programs";
- Choose "All Programs" in this menu and search for Winamp. Check the box next to "Always open in app" to make it the default program.
Solve problems with B4S files
Rest assured, any issues with B4S files can typically be addressed with simple software adjustments. See the tips below for help.
Why does Winamp stop responding or crash intermittently?
Winamp crashes can be caused by outdated software. Keep your Radionomy products up to date by installing the latest updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
What are the best practices for repairing a B4S file that has gone bad?
Use a data recovery program to open the damaged B4S file and from the menu choose "Repair" function to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged document files.
What are the warning signs that my B4S file may be corrupted?
Common indications of damaged B4S document files are:
- Error messages appear during the course of working with the file;
- Editing the archive in Winamp results in slow or unresponsive behavior;
- Opening the file results in an error or a failed attempt;
- Unexpected expansion of the total size of the B4S file;
- Opening the file in Winamp or other programs causes them to hang or crash;
How to edit a B4S file?
To edit B4S files, it is essential to install software that supports not only viewing but also editing the document files. Online B4S editors provide limited functionality compared to full-featured software for Winamp Playlist Format.
List of Top B4S editors 2026
Based on the criteria above, here is a selection of B4S editors you can use.
| B4S Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Playlist Manager | Sprintbit | Windows | 4.7 out of 5 (38 reviews) |
| Winamp | Radionomy | Windows | 4.6 out of 5 (42 reviews) |
Convert to and from B4S
If obstacles arise while working with a B4S file, you may convert it to formats like PLS or other similar types for smoother handling.
Keep in mind that converting a B4S file may introduce some limitations, but the original format can often be restored.