Convert MMF files online for free
The converter easily converts your MMF file to various formats - free and online. No Yamaha MidRadio or or other Audio software needed.
The converter also works in reverse, so you can convert other "Mobile Ringtone Format" formats to MMF without using software like Yamaha MidRadio or a similar tool.
The .mmf file extension represents a diverse set of data types, most commonly the Yamaha SMAF (Synthetic Music Mobile Application Format). These files were the industry standard for polyphonic ringtones on early 2000s mobile devices (e.g., older Samsung and Nokia phones), combining MIDI instrument data with small PCM audio samples to create rich sound with minimal file size. However, this format is now effectively obsolete; modern smartphones (iOS, Android) and desktop players like VLC Media Player do not natively support it, locking your nostalgic audio inside an inaccessible container. To retrieve these sounds, users should convert .MMF to universally compatible formats like MP3 for listening or MIDI for editing the musical score.
A secondary but critical use of the .mmf extension is in automotive diagnostics, specifically as ECU Tuning Data associated with tools like WinOLS or Magic Motorsport. These binary files contain engine map configurations used to modify vehicle performance. They are often proprietary or encrypted, making them impossible to view with standard text editors. Other legacy formats using this extension include the Meal-Master recipe database (a text-based format) and older Microsoft Mail message files. For these text-heavy variants, converting to PDF, TXT, or PST is essential for archiving and modern access.
Use Convert.Guru to open and convert your MMF file.
Users also converted SMF, NRT, MLD, MXMF, BIN, JPG, ZIP, VTF, MID, SF2, DOCX, MP3 and MP4 files.
If you want to convert MMF file to MIDI, SMF, M4A or ALAC, you can use Yamaha MidRadio or similar software from the "Synthetic Mobile Audio" category. In the File menu, look for Save As… or Export….
To convert MIDI, MID or RA files to MMF, try Yamaha MidRadio or another comparable tool in the "Synthetic Mobile Audio" 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 MMF converter.