Convert 3GPP Audio (.3ga) to MPEG-4 Part 14 (.mp4) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .3ga file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp4 file when it's ready.
MP4 (MPEG-4 Part 14) is the universal multimedia container format — the de facto standard for video and audio on the internet, mobile devices, and virtually every media platform. Converting 3GA recordings from old Samsung, Nokia, and LG phones to MP4 creates files that play on literally every modern device and platform without exception. From iPhones to Android phones, Windows PCs to Linux desktops, web browsers to smart TVs, MP4 is the one format that works everywhere.
The conversion transcodes the AMR audio from the 3GA container into AAC-LC and wraps it in the MP4 container. The output is an audio-only MP4 file (functionally similar to M4A but with the .mp4 extension) that media players handle as a standard audio file. The MP4 extension has the advantage of being recognized by systems that might not associate .m4a with audio playback, making it even more universal than M4A for cross-platform compatibility.
MP4 is the single most compatible media format in existence. Every smartphone, computer, tablet, smart TV, game console, and web browser made in the last 15 years plays MP4 files natively. When you convert old 3GA recordings to MP4, you eliminate every possible compatibility barrier. There is no device or platform that will refuse to play an MP4 file with AAC audio — it is the universal common denominator for digital media.
The .mp4 extension also has stronger file type associations than .m4a on many systems. Windows file explorers, email clients, messaging apps, and web servers all recognize .mp4 and apply appropriate MIME types automatically. For users who want the absolute safest format choice for sharing old phone recordings across different platforms and recipients, MP4 is the most reliable option available.
FFmpeg decodes the AMR-NB (8 kHz) or AMR-WB (16 kHz) audio from the 3GA container and re-encodes it as AAC-LC (192 kbps, 44.1 kHz) in the MP4 container (MPEG-4 Part 14). The output uses the 'isom' brand in the ftyp box for maximum compatibility across players. The moov atom is placed at the beginning of the file (faststart) for instant playback and progressive download without buffering. No video track is included — the file is audio-only MP4.
At 192 kbps AAC-LC, the encoding is completely transparent for AMR source material from 3G-era phones. The original AMR narrowband recording (3.4 kHz bandwidth) is the quality ceiling. The AAC encoder faithfully preserves all captured audio information without perceptible loss. The MP4 container adds no quality impact — it is a metadata wrapper around the AAC audio bitstream.
| Device | 3GA | MP4 |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
MP4 is the safest format choice for converting old 3GA recordings when maximum compatibility is the priority. It plays everywhere, shares everywhere, and integrates with every platform and application in the modern digital ecosystem.
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Mọi trình duyệt, mọi thiết bị
| Native |
| Tính năng | 3GA | MP4 |
|---|---|---|
| Tên đầy đủ | 3GPP Audio | MPEG-4 Part 14 |
| Phần mở rộng | .3ga | .mp4 |
| Phù hợp nhất cho | Mobile recording | Universal compatibility |