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.ASF File Extension

File TypeAdvanced Systems Format File

3.7 (173 Votes)
CategoryVideo Files

What is an ASF file?

An ASF file is a media file stored in the Advanced Systems Format (ASF), a proprietary video and audio container format. It may store only audio data, or video and audio data, along with optional metadata, such as title, author, and copyright bibliographic data. ASF files are developed by Microsoft primarily for streaming media online.

More Information

The ASF container format only specifies the structure of how the audio or video is streamed online, which depends on various factors, such as network bandwidth and server performance. The ASF format does not specify the codec used to encode the audio or video stored in the ASF container format.

While the .asf file extension may be used for media files saved in the ASF format, the .wma and .wmv extensions are more commonly used. If the ASF container format stores audio, it is typically saved as a Windows Media Audio (.WMA) file. If it stores video, it is typically saved as a Windows Media Video (.WMV) file. Audio and video data stored within these files may be compressed using a variety of video codecs.

Open and view .ASF files with File Viewer Plus.

Programs that open ASF files

Updated 9/13/2019

About ASF Files

Our goal is to help you understand what a file with a *.asf suffix is and how to open it.

The Advanced Systems Format file type, file format description, and Mac, Windows, Linux, and iOS programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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