ASF to AMR Converter

Convert ASF to AMR online, for free.



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Audio Options
Choose a codec to encode or compress the audio stream. To use the most common codec, select "Auto" (recommended). To convert without re-encoding audio, choose "Copy" (not recommended).
100% represents the original volume. To double the volume, increase it to 200%. To reduce volume by half, select 50%
Enable if you want to reverse audio stream
Trim Settings
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How to Convert ASF to AMR?

  1. Click the “Choose Files” button to select your ASF files.
  2. Click the “Convert to AMR” button to start the conversion.
  3. When the status change to “Done” click the “Download AMR” button

Easy to Use

Simply upload your ASF files and click the convert button. You can also batch convert ASF to AMR format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our ASF to AMR Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically delete after a few hours.


Advanced Systems Format (ASF) is a proprietary Microsoft product, which serves as a container for Windows multimedia content. Microsoft designed it for streaming and to be independent of systems and protocols. It supports chapters, captions, subtitles, metadata tags, streaming, and hardware players, but does not support menus.

 

How to open an ASF file?

It is best to use Windows Media Player to open an ASF file. Alternatively, VLC media player is a good choice too. Keep in mind that ASF can contain WMA and WMV files, which might display as the file extension of the ASF file.

 

Developed by: Microsoft

Initial release: 1995

Useful links:

https://en.wikipedia.org/wiki/Advanced_Systems_Format

https://docs.microsoft.com/en-us/windows/desktop/wmformat/overview-of-the-asf-format

Adaptive Multi-Rate (AMR) is a compressed audio file that is often used for speech coding. The AMR speech codec focuses on narrowband signals, which makes it ideal for voice recordings and radio. It is used regularly in Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS).

 

How to open an AMR file?

Since AMR files are often used on mobile phones, including for MMS messaging, most 3G mobile devices are able to open them. AMR also opens with VLC media player, QuickTime, RealPlayer, and Xine.

 

Other software, such as the free audio-editing software Audacity, can open AMR files. Download audacity easily at SourceForge.net. Because AMR files are heavily compressed and focused on narrowband signals, they are not suitable for music files.

 

Developed by: 3rd Generation Partnership Project (3GPP)

Initial Release: 1999

Useful links:

https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec

https://www.etsi.org/

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