Convert MP4 to ASF Online — Free
Fast, free MP4 to ASF converter. No registration required.
Drop files here or click to browse
Supports: MP4 files
Max: 100MB (free) · 2GB (Pro)
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How to Convert
Upload your .mp4 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .asf file when it's ready.
What is MP4?
MP4 is the most widely used video container format. It stores video, audio, subtitles, and metadata. Compatible with virtually every device and platform, from smartphones to smart TVs.
Format Details
- Full Name
- MPEG-4 Part 14
- Extension
- .mp4
Key Features
- Universal compatibility
- Streaming support
- Small file sizes
- Hardware-accelerated playback
What is ASF?
ASF is a Microsoft container format designed for streaming audio and video. It can contain various codecs including WMV and WMA.
Format Details
- Full Name
- Advanced Systems Format
- Extension
- .asf
Key Features
- Streaming optimized
- Microsoft format
- DRM support
- Web delivery
MP4 vs ASF
| Feature | MP4 | ASF |
|---|---|---|
| Full Name | MPEG-4 Part 14 | Advanced Systems Format |
| Extension | .mp4 | .asf |
| Best For | Universal compatibility | Streaming optimized |