MMF vs GSM — Comparison & Free Converter
Fast, instant MMF (SMAF) to GSM conversion. No signup required. Just drop your .mmf file and get .gsm in seconds.
Batch Settings
Pernahkah Anda menyimpan rekaman suara penting atau melodi favorit dalam format MMF, namun kesulitan saat ingin membagikannya lewat aplikasi pesan instan atau memutarnya di ponsel lama? Atau mungkin Anda seorang guru yang ingin memastikan materi audio bisa diakses oleh semua murid, bahkan dengan koneksi internet yang terbatas? MMF, meski sempat populer, kini seringkali kurang praktis untuk kebutuhan berbagi cepat atau penggunaan di perangkat yang beragam. Di sinilah konversi ke GSM menjadi solusi yang sangat pas. Format GSM dikenal karena ukurannya yang ringkas dan kompatibilitasnya yang luas, menjadikannya pilihan ideal untuk audio yang perlu diakses secara efisien, terutama di lingkungan mobile-first seperti Indonesia. Dengan mengubah MMF ke GSM, Anda tidak hanya menghemat ruang penyimpanan, tetapi juga memastikan audio Anda dapat dinikmati siapa saja, kapan saja, tanpa hambatan berarti.
- Berbagi rekaman ceramah via WhatsApp
- Materi dongeng untuk anak-anak pedesaan
- Audio demo musik indie lokal
Di Indonesia, format GSM sering digunakan untuk pesan suara atau rekaman singkat karena efisiensinya dalam penggunaan data seluler yang masih jadi pertimbangan utama bagi banyak pengguna.
About MMF (SMAF) to GSM Conversion
MMF or GSM — which format should you use? The answer depends on your needs. Here's a quick breakdown.
MMF is a widely used file format. It has common platform support. GSM is a widely used file format. It has common platform support.
So when should you convert MMF to GSM? This conversion is ideal when you When you need a GSM file. This conversion helps you convert between formats quickly.
Converting MMF to GSM maintains high quality with CocoConvert's optimised encoder settings.
If you've decided GSM is the right choice, CocoConvert makes the conversion effortless. Upload your .mmf file, pick GSM, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert MMF (SMAF) to GSM
- 1
Choose your MMF file
Upload your .mmf file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to GSM
Select .gsm from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large audio files.
- 4
Get your GSM file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert MMF (SMAF) to GSM
Your MMF file is decoded and re-encoded as GSM.
Your MMF file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in GSM format
The converted file is ready for download
Format Comparison
MMF (SMAF)
.mmf file
| Extension | .mmf |
| MIME Type | audio/x-smaf |
| Category | Audio |
GSM
.gsm file
| Extension | .gsm |
| MIME Type | audio/gsm |
| Category | Audio |
Should You Convert MMF (SMAF) to GSM?
When to Convert
- ✓When you need a GSM file
Frequently Asked Questions
Should I use MMF or GSM?
It depends on your goal. MMF preserves full quality. GSM preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is GSM higher quality than MMF?
Not necessarily. Converting MMF to GSM maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert MMF to GSM on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for MMF to GSM?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for MMF to GSM?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.