Free Online ASF Converter
Convert Windows ASF video to MP4, MKV, MOV and more. Free, fast, and secure.
Max file size 10MB. Sign up for more.
| File Name | Size | Convert To |
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Checking files and selected output formats.
| File Name | File Size | Download |
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How to Convert ASF Files Online — Free & Instant
Convert Windows ASF video to MP4, MKV, or MOV for reliable playback.
Add your ASF (Advanced Systems Format) file — Microsoft’s container often used for WMV video. It plays poorly outside Windows Media Player.
Choose MP4 for universal playback, MKV for a flexible container, or MOV for Apple devices and editing.
Download the converted file and play it on any device. Uploads are deleted within 24 hours.
Video Format Comparison
Choose the right output format when converting ASF video files.
| Format | Compression | File Size | Compatibility | Best For |
|---|---|---|---|---|
| MP4 | H.264/H.265 | Small–medium | Universal | Sharing, streaming, social media |
| MOV | H.264/ProRes | Medium–large | Apple, QuickTime | Mac editing, iPhone recordings |
| MKV | Multiple codecs | Large | PC, media players | High-quality archiving, subtitles |
| WebM | VP8/VP9 | Small | Web browsers | Web embedding, HTML5 video |
| AVI | Various | Large | Windows, legacy devices | Legacy compatibility, editing |
Why Convert ASF Files?
ASF plays best in Windows Media Player and struggles elsewhere. Convert to MP4 so your video works on Mac, iPhone, Android, and browsers.
Convert ASF to MP4 or MOV for reliable import into modern editors that don’t handle the ASF container well.
Convert ASF to MP4 to upload to video platforms and send through messaging apps without compatibility warnings.
Batch-convert ASF and WMV-in-ASF files to MP4 so an entire archive uses one widely-supported format.
Move video off Microsoft’s ageing ASF container into MP4 for long-term, cross-platform playback.
Convert ASF video directly in your browser — no desktop apps, no plugins. Files up to 10 MB are always free, and all videos are deleted from our servers within 24 hours.
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