.ASF File Extension

.ASF File Extension

File Type

Advanced Systems Format File

Developer Microsoft
3.7  |  174 Votes
Category Video Files
Format Binary

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.

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Programs that open ASF files

Updated September 13, 2019

Verified by FileInfo.com

The FileInfo.com team has independently researched the Advanced Systems Format file format and Mac, Windows, Linux, and iOS apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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