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| Advanced Systems Format | |
| Filendelse: | .asf |
|---|---|
| MIME-type: | video/x-ms-asf, application/vnd.ms-asf [1] |
| macos-typekode: | 'ASF_' |
| Uniform Type Identifier | com.microsoft.advanced-systems-format |
| Magic number: | 30 26 b2 75 |
| Udviklet af: | Microsoft |
| Formattype: | Container format |
| Omkranser: | WMA, WMV, MPEG-4 etc. |
Advanced Systems Format (tidligere Advanced Streaming Format, Active Streaming Format) er Microsofts proprietære digital audio/digital video container format, designet specielt til at streame. ASF er en del af Windows Media frameworket.