Convert ASF to MP4

ASF to MP4 converterFREE

Drop a .ASF file here

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How to convert ASF to MP4

DRM-protected ASF files (old Windows Media Store purchases) cannot be converted - FFmpeg, VLC, and HandBrake will all fail or produce a blank file.
.asf and .wmv use the same container format; if your file is named .wmv, the same conversion steps apply.
Re-encoding to H.264 introduces a small quality loss; a low-bitrate source will not look sharper after conversion.

Can I convert ASF to MP4 for free?

Yes - HandBrake, VLC, AviDemux, and FFmpeg are all free and open-source, as is our on-page converter.

Why does my converted MP4 have no audio?

The source ASF likely has a WMA audio track that was not re-encoded; make sure your tool is set to output AAC audio.

My ASF file produces a blank or silent MP4 - what is wrong?

The file is almost certainly DRM-protected; open it in VLC and look for a rights or licence error.

Is ASF the same as WMV?

Yes - .asf and .wmv share the same container format and Windows Media codecs, so conversion steps are identical for both.

Learn about the formats: .ASF · .MP4