Browse Tools Top 100
ASF MP4
File conversion

Convert ASF to MP4

Convert now
Verified by Adam B.· reviewed by FE Editorial ·updated Aug 6, 2026
QUICK ANSWER
Is it possible to convert ASF to MP4?
Yes - ASF converts to MP4.

You can do it right here with our free converter - no sign-up, and your file is deleted right after.

The fastest path is our free converter above - upload your ASF and download the MP4. Note that DRM-protected ASF files (old Windows Media purchases) cannot be converted by any tool without the original licence.

8 programs
Also to MP4: AVCHD · USM · MXF

On this page

Tested on macOS, Windows & Linux
Last verified Sep 2026

More free converters

HEIC, PNG, WEBP, MP3 and more - every tool here is free.

Open the toolbox
ASF → MP4 converterFREE
Drop a .ASF file here
or pick one - we convert it to .MP4 and give you the file to download

Why convert ASF to MP4?

ASF (Advanced Systems Format) is Microsoft's legacy streaming container from 1999, built around Windows Media codecs that phones, tablets, and modern editors no longer support natively. .MP4 with H.264 video and AAC audio is the universal standard - it plays on iOS, Android, Windows, macOS, and every major browser. Switching the container makes old recordings share-ready and import-ready without losing their content.

How to convert ASF to MP4

HandBrake FREE

Open your .asf in HandBrake, pick an MP4 preset, and click Start Encode - the output is H.264/AAC in an .mp4 container.

VLC FREE

Go to Media > Convert/Save, add your .asf, choose an MP4/H.264 profile, set the output path, and click Start.

AviDemux FREE

Open the .asf in AviDemux, set the output container to MP4 and the codecs to H.264 and AAC, then save.

Command line - FFmpeg CLI

Run ffmpeg -i input.asf -c:v libx264 -c:a aac output.mp4 to re-encode to H.264 and AAC inside an .mp4 container.

Programs that convert ASF

Adobe Premiere Pro
Aimersoft DRM Media Converter for Windows
AviDemux
Free Studio
iPad Video Converter Factory Pro
MediaCoder
Movavi Video Converter Personal
SUPER

About these formats

.ASF Advanced Systems Format

An ASF file is Microsoft's Advanced Systems Format container - the same format that underlies Windows Media Video (.wmv) and Windows Media Audio (.wma). On Windows, double-click it and…

Open .ASF details →
.MP4 MPEG-4 Part 14 Video File

An MP4 file is a video container (MPEG-4 Part 14, standardized 2003) that holds video, audio, subtitles, and chapters in one file. It plays on every phone, computer, browser, and smart TV…

Open .MP4 details →

Quality & what to watch

  • 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.

Frequently asked questions

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.