Convert Nintendo Wii U and Switch BFSTM music to MP3, with loops played through and faded out. Upload files up to 20GB and download the converted result in a few clicks.
Drag & Drop your BFSTM file here
BFSTM files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
Link
20GB upload limit.
5.0/5
Trusted for 1,827,796+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your BFSTM files
Drag in .bfstm files extracted from a Wii U or Switch game, mod or theme.
02
Convert to MP3
Start the conversion. vgmstream decodes the stream, renders any loop with a fade, and LAME encodes the MP3.
03
Download the MP3
Download each track, or a whole soundtrack as one ZIP.
BFSTM
BFSTM is the streamed music format of Nintendo Wii U and Switch games, usually encoded as DSP-ADPCM with loop points.
MP3
MP3 is the most widely supported compressed audio format, playing on virtually every phone, car stereo and computer.
FILE FORMATS
SOURCE
Binary Cafe Stream files carry background music in Wii U and Switch titles. Most use Nintendo's DSP-ADPCM codec at about a quarter of the PCM size, some use PCM16, and many hold several stereo tracks that the game mixes live. Loop points in the header let a track repeat forever without a gap.
TARGET
MPEG-1 Audio Layer III has been the universal music format since the 1990s. It compresses audio by removing sounds the ear is unlikely to hear, so a song takes a few megabytes instead of tens. ID3 tags carry the title, artist and album art, and every phone, browser, car stereo and editor plays it.
| Feature | BFSTM | MP3 |
|---|---|---|
| Developed by | Nintendo | MPEG (Fraunhofer) |
| File extension | .bfstm | .mp3 |
| Compression | DSP-ADPCM or PCM | Lossy |
| Size vs uncompressed WAV | About 1/4 (ADPCM) | About 1/7 to 1/10 |
| Tags and cover art | Loop points, no tags | ID3 tags and cover art |
| Best for | Wii U and Switch game music | Music and podcasts everywhere |
| Plays on phones and browsers | No, needs vgmstream | Yes |
USE CASES
When a game music stream needs to play outside the console.
Listen to a Switch soundtrack on your phone
Turn BFSTM files you've extracted from your own game into MP3s for any music app.
Check a music mod before installing it
Preview a replacement track without loading the game.
Share a track with a modding team
Send MP3 previews that anyone can play, instead of raw BFSTM files.
Find the right file in a sound folder
Games name streams cryptically. Convert a batch and listen to find the track you need.
Make a video about a game
Video editors accept MP3. Use it for commentary or analysis videos where fair use applies.
Compare game versions
Convert the same track from two releases and compare them by ear.
Archive your own game's music
Keep playable copies of music from games you own.
Study game music arrangement
Hear how loops and intros are built in Wii U and Switch titles.
Test a custom BFSTM you made
Check that a track you encoded loops and sounds right before using it.
Build a playlist for a speedrun stream
Create a playlist of a game's music for background listening.
SUPPORTED FILES
BFSTM streams from Wii U and Switch games are supported.
The most common BFSTM encoding in Wii U and Switch games.
Uncompressed BFSTM files decode without loss before MP3 encoding.
Streams with 4 or 6 channels (2 or 3 stereo tracks) are mixed into one stereo MP3.
Nintendo 3DS uses the related BCSTM format. Use our BCSTM to MP3 converter for those.
Upload a folder of BFSTM files and download the MP3s as a ZIP.
Only convert audio from games you own or have permission to use.
TROUBLESHOOTING
Game streams work differently from normal music files.
01
Looping tracks are rendered with the loop played twice and a 10 second fade, so you hear the music as the game would play it.
02
Some BFSTM files hold several layers that the game turns on and off. In the MP3 every layer is mixed together at equal level.
03
This usually means the file isn't a complete BFSTM or was extracted incorrectly. Extract it again from the game files.
04
A file holding less than 97% of the audio its header describes was cut off while extracting or downloading. Upload the complete file.
05
The file may be damaged or not a real BFSTM. Some games use other formats, such as BWAV or Opus streams, under similar names.
06
Tracks without loop points keep their exact length and end where the file ends.
vgmstream is the reference decoder for game audio, used through foobar2000 or the command line. dragdropdo runs the same decoder in the browser, so you can turn BFSTM into MP3 on any device.
| What matters | dragdropdo | vgmstream and Desktop Tools |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~foobar2000 plus the vgmstream plugin, or vgmstream-cli. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~No. Windows and command-line tools. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Yes, with scripts or foobar2000's converter. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Free. |
| Choosing loop count and fade | ✓Fixed: an inner loop plays twice, then fades over 10 seconds. | ~Yes. vgmstream-cli sets the loop count and fade length. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
1.8M+
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5.0
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Files kept
Auto-delete in 24h
WHY DRAGDROPDO
Convert BFSTM to MP3 in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE BFSTM TOOLS
BFSTM is the NintendoWare streamed audio format (FSTM) used for background music in Wii U and Nintendo Switch games. It usually holds 4-bit DSP-ADPCM audio, sometimes PCM, and can store loop points; Wii U files are big-endian and Switch files little-endian.
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FAQ
Answers to common questions about dragdropdo's BFSTM to MP3 converter.
