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FLV ASF
Free online converter

Convert FLV to ASF

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

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert FLV to ASF

  1. Add your .FLV file - drop it in the box above or click to browse.
  2. Convert it to .ASF in a few seconds.
  3. Download your new .ASF file.

What to expect

  • Re-encode from the FLV stream into the ASF (Windows Media) container; this is lossy.
  • ASF is proprietary; it underlies WMV/WMA and plays most easily on Windows or through VLC.
  • Windows Media codecs are generally less space-efficient than H.264 at comparable quality.

Frequently asked questions

Is FLV to ASF a lossy conversion?
Yes. The FLV stream (H.263/VP6/H.264 video, MP3/AAC audio) is re-encoded into ASF, the Microsoft container behind WMV and WMA, so the media is rebuilt rather than copied.
Why convert FLV to ASF?
ASF is the native Windows Media container and plays in Windows Media Player without setup, which suits Microsoft-centric playback and tools. FLV depends on the now-dead Flash Player.
Where does an ASF file open?
On Windows, double-clicking it plays in Media Player. On Mac, Linux, Android or iOS, VLC opens it.
Are there caveats with ASF output?
ASF is a proprietary Microsoft format, so playback is smoothest on Windows and via VLC elsewhere. The conversion re-encodes to Windows Media codecs, which are less efficient than modern H.264.
Learn about the formats: .FLV · .ASF
Programs that convert FLV: Adobe Premiere Pro · Aimersoft DRM Media Converter for Windows · AviDemux · Free Studio · MediaCoder · Movavi Video Converter Personal · SUPER · Xlinksoft AVI Video Converter