Convert AMR to 3GP — Free Online Converter
Convert Adaptive Multi-Rate Audio (.amr) to 3GPP Multimedia (.3gp) online for free. Fast, secure audio conversion with no watermarks or registration.
Truyền tải an toàn
Tải lên được mã hóa HTTPS
Quyền riêng tư là ưu tiên
Tệp tự động xóa sau khi xử lý
Không cần đăng ký
Bắt đầu chuyển đổi ngay lập tức
Hoạt động mọi nơi
Mọi trình duyệt, mọi thiết bị
Cách chuyển đổi
Upload your .amr 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 .3gp file when it's ready.
Giới thiệu về chuyển đổi AMR sang 3GP
AMR (Adaptive Multi-Rate) is the default voice codec used by GSM mobile networks worldwide, encoding speech at bit rates between 4.75 and 12.2 kbps. Converting AMR recordings to 3GP wraps the audio inside a 3GPP multimedia container that older feature phones and Android devices handle natively. Because 3GP is essentially a lightweight MPEG-4 profile designed for cellular networks, the resulting file keeps the tiny footprint AMR is known for while gaining broader playback support on mobile handsets.
Tại sao nên chuyển đổi AMR sang 3GP?
Standalone .amr files are difficult to share — most messaging apps and email clients refuse to attach or preview them. Packaging the same AMR audio stream inside a 3GP container makes the file recognizable to media players on virtually every phone sold in the last two decades. 3GP also allows you to add metadata such as a title or timestamp, which raw AMR files cannot carry. If you plan to embed the recording in an MMS message, 3GP is the expected container on many carriers.
Các trường hợp sử dụng phổ biến
- Attach a voice memo captured on a legacy phone to an MMS message
- Play an AMR call recording on an older Android device that only supports 3GP
- Archive voicemail files in a container that preserves metadata
- Prepare phone recordings for transfer to a basic media player
Cách hoạt động
The conversion remuxes the AMR-NB stream into a 3GP container (MPEG-4 Part 12 profile) without re-encoding, so there is zero quality loss and the process is nearly instantaneous. FFmpeg copies the AMR audio track directly using stream mapping. The 3GP container adds a few hundred bytes of header overhead but does not alter the underlying codec data.
Chất lượng & hiệu suất
Because the audio stream is copied rather than re-encoded, the output quality is bit-for-bit identical to the source AMR file. Expect narrow-band speech clarity suitable for voice memos and phone calls — not music.
Khả năng tương thích thiết bị
| Device | AMR | 3GP |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Partial |
| Web Browser | No | No |
Cài đặt được đề xuất theo nền tảng
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Mẹo để có kết quả tốt nhất
- 1Use VLC or MX Player on Android if the default player refuses bare .amr files — both support the format natively.
- 2If you need wider compatibility beyond phones, consider converting to AAC or MP3 instead of 3GP.
- 3Check whether your AMR file is narrow-band or wide-band (AMR-WB), as some older 3GP decoders only handle narrow-band.
- 4For batch processing of many voicemail files, upload them all at once — our converter handles multiple files in sequence.
Chuyển đổi liên quan
Wrapping AMR audio in a 3GP container is the simplest way to make voice recordings playable on mobile devices that do not recognize bare .amr files. The conversion is lossless and instant.
AMR so với 3GP
| Tính năng | AMR | 3GP |
|---|---|---|
| Tên đầy đủ | Adaptive Multi-Rate Audio | 3GPP Multimedia |
| Phần mở rộng | .amr | .3gp |
| Phù hợp nhất cho | Speech optimized | Mobile optimized |