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HomeMP4 vs WMV
.mp4
.wmv

MP4 vs WMV

Compare MPEG-4 Video and Windows Media Video formats — understand the key differences and when to use each

Format Overview

MP4

MPEG-4 Video

MP4 (MPEG-4 Part 14) is the world's most widely used video container format, standardized as ISO/IEC 14496-14. MP4 can contain video (H.264, H.265/HEVC, AV1), audio (AAC, MP3, AC-3), subtitles (SRT, ASS), and metadata in a single file. H.264/AVC is the most common video codec in MP4 files, providing excellent quality at reasonable file sizes. MP4 supports 4K, 8K, HDR (HDR10, Dolby Vision), 360° video, and multiple audio tracks. It's the default video format for smartphones, digital cameras, streaming services (YouTube, Netflix), social media platforms, and web browsers. MP4 files are natively playable on virtually every device and operating system without additional software. The format supports fast seeking, progressive download, and adaptive streaming (DASH). For web video, MP4 with H.264 video and AAC audio provides the widest compatibility.

.mp4video

WMV

Windows Media Video

Windows Media Video (.wmv) is a video file format.

.wmvvideo

MP4 vs WMV: Feature Comparison

FeatureMP4WMV
Full NameMPEG-4 VideoWindows Media Video
File Extension.mp4.wmv
Categoryvideovideo
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use MP4 vs WMV

Use MP4 when you need:

  • •Files in MPEG-4 Video format for maximum compatibility
  • •Industry-standard video format support
  • •Wide software and platform compatibility

Use WMV when you need:

  • •Files in Windows Media Video format for specific workflows
  • •Optimized video format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

MP4 WMVWMV MP4
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Frequently Asked Questions

What is the difference between MP4 and WMV?
MP4 (MPEG-4 Video) and WMV (Windows Media Video) are both video file formats. MP4 files use the .mp4 extension while WMV uses .wmv. They differ in compression, quality, compatibility, and intended use cases.
Can I convert MP4 to WMV for free?
Yes! Convert999 lets you convert MP4 to WMV completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, MP4 or WMV?
It depends on your use case. MP4 (MPEG-4 Video) may be better for certain workflows, while WMV (Windows Media Video) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

MP4 Converter

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WMV Converter

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File Tools

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Convert to MP4

All sources → MP4

Convert to WMV

All sources → WMV

Format Statistics

Trends & data 2025

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