Convert Nintendo audio streams (BFSTM) online for free
The converter easily converts your BFSTM audio streams to various formats - free and online. No vgmstream or other Audio software needed.
To convert other file formats to the "Game Audio Stream" file type, you need software like vgmstream or a similar tool.
A .BFSTM file is a proprietary audio stream format developed by Nintendo primarily for background music (BGM) and voice tracks in Wii U and Nintendo Switch games. These files often utilize a custom ADPCM compression algorithm and contain embedded looping metadata designed to make music play endlessly during gameplay without seamless gaps.
Because .BFSTM is a closed, hardware-specific format, it presents significant playback and editing challenges for standard PC users. Standard media players like Windows Media Player or iTunes cannot read it, and most digital audio workstations (DAWs) like Audacity or Ableton Live will reject the file outright. Users typically have to rely on specialized, community-built reverse-engineering tools like vgmstream to decode the audio.
To make this audio usable outside of Nintendo hardware, conversion is highly recommended. For audio editing and mixing, convert your .BFSTM to WAV to ensure a widely supported, uncompressed format. If you want to listen to the tracks on your smartphone or share them online, convert to MP3 or OGG. For long-term archiving without quality loss, FLAC is the ideal target. Note that converting a .BFSTM file to standard consumer formats will usually strip its proprietary continuous-loop metadata. Drop your file here to view and convert it securely right in your browser.
Use Convert.Guru to open and convert your BFSTM file.
Users also converted BRSTM, BFSAR, BCSTM, MP3, WAV, BWAV, NUS3AUDIO, BARS, NRO and SUPX files.
If you want to convert BFSTM file to M4A, ALAC or APE, you can use vgmstream or similar software from the "Video Game Audio Streaming" category. In the File menu, look for Save As… or Export….
To convert MIDI, AAC, TTA, AU, WV, DTS, MID, FLAC, RA, MP3, PCM or WAV files to BFSTM, try vgmstream or another comparable tool in the "Video Game Audio Streaming" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our BFSTM converter.