How to Convert MP3 to MMF — Quick & Free
Fast, instant MP3 to MMF (SMAF) conversion. No signup required. Just drop your .mp3 file and get .mmf in seconds.
Batch Settings
Vous avez des fichiers MP3 et souhaitez les convertir au format MMF ? Que ce soit pour des sonneries personnalisées sur des téléphones plus anciens, des synthétiseurs compatibles ou des projets audio spécifiques nécessitant ce format compact, notre outil est là pour simplifier cette tâche. Le MMF, ou Synthetic Music Mobile Application Format, a été historiquement privilégié pour sa légèreté et son efficacité sur des appareils aux ressources limitées. Bien que moins répandu aujourd'hui, il conserve son utilité dans certains contextes. Notre convertisseur en ligne vous offre une solution rapide et fiable, transformant vos pistes audio sans effort. Fini les logiciels compliqués : téléchargez votre MP3, et obtenez votre MMF en quelques clics, prêt à l'emploi pour vos besoins spécifiques, qu'ils soient personnels ou professionnels.
- Archivage sonore sur anciens appareils
- Création de sonneries pour téléphones mobiles d'ancienne génération
- Intégration dans des applications embarquées ou jeux vidéo rétro
Historiquement, certains opérateurs de téléphonie mobile en France et en Belgique proposaient des catalogues de sonneries payantes au format MMF, avant la démocratisation des formats audio plus modernes.
About MP3 to MMF (SMAF) Conversion
Short answer: yes, you can convert MP3 to MMF online for free, and quality is well preserved with the right settings. Just upload your .mp3 file to CocoConvert, pick MMF as the output, and click Convert. The whole process takes seconds.
Now for the details. MP3 is the universal audio format — high compression, wide compatibility, ideal for music and podcasts. MMF is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your MP3 file is decoded and re-encoded as MMF. Converting MP3 to MMF maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert MP3 to MMF (SMAF)
- 1
1. Upload MP3
Drop your .mp3 file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select MMF
Choose .mmf from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .mmf file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert MP3 to MMF (SMAF)
Your MP3 file is decoded and re-encoded as MMF.
Your MP3 file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in MMF format
The converted file is ready for download
Format Comparison
MP3
.mp3 file
| Extension | .mp3 |
| MIME Type | audio/mpeg |
| Category | Audio |
MMF (SMAF)
.mmf file
| Extension | .mmf |
| MIME Type | audio/x-smaf |
| Category | Audio |
Should You Convert MP3 to MMF (SMAF)?
When to Convert
- ✓When you need a MMF file
Frequently Asked Questions
Is MP3 to MMF conversion free?
Yes. CocoConvert offers free MP3 to MMF conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is MP3 to MMF conversion?
Most files convert in 2–10 seconds depending on size. Large audio files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded MP3 file and the converted MMF file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting MP3 to MMF lose quality?
Converting MP3 to MMF maintains high quality with CocoConvert's optimised encoder settings.
Can I convert MMF back to MP3?
Yes, CocoConvert supports MMF to MP3 conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
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