ASF to AVI Converter

Convert ASF files to AVI free in your browser — no signup, no install, and the file is never uploaded to a server.

Completely free Files are never uploaded No signup required
Drop files or click to select
ASF → AVI

What changes in this conversion

  • The picture and sound are re-encoded to H.264 video with AAC audio inside the AVI container, which is what makes the result play on the widest range of devices.

How to use

  1. Add your ASF file

    Drag the ASF file onto the drop area above, or click it to pick a file from your device. You can add several files at once.

  2. Confirm AVI as the output

    AVI is already selected as the output format on this page. You can pick the resolution. Encoding is the slowest part, so smaller resolutions finish sooner.

  3. Run the conversion

    Press the convert button. Video is re-encoded frame by frame on your own machine, so a long clip can take several minutes. The tab has to stay open.

  4. Download the AVI file

    When it finishes, download the AVI file. Converting multiple files gives you the option to download them together as a ZIP.

About these formats

ASF Advanced Systems Format

Microsoft's streaming container, holding WMV and WMA content.

Commonly used for Legacy Windows streaming

ASF File format reference

AVI AVI Video

An old video container created by Microsoft in 1992. Compatibility is broad, but support for modern codecs and subtitles is limited.

Commonly used for Legacy video files, older camcorder recordings

AVI File format reference

Frequently asked questions

Is converting ASF to AVI really free?

Yes. ASF to AVI conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.

Are my ASF files uploaded to a server?

No. The conversion runs entirely inside your browser using WebAssembly, so the ASF file never leaves your device. That is also why it works without an internet connection once the page has loaded.

Is there a file size limit for ASF to AVI conversion?

The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.

Convert ASF files to other formats

ASF AAC ASF FLAC ASF GIF ASF M4A ASF MKV ASF MOV ASF MP3 ASF MP4 ASF OGG ASF OPUS ASF WAV ASF WEBM

Convert other formats to AVI

3G2 AVI 3GP AVI DIVX AVI F4V AVI FLV AVI M2TS AVI M4V AVI MKV AVI MOV AVI MP4 AVI MPE AVI MPEG AVI

Video converter

What each file format is, what it is used for, and which formats it can be converted to.

Open converter Browse the full format reference