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WMV to M4A Converter — Free, Online, No Upload

Your old WMV video collection hides audio you can finally play on iPhone — convert to M4A and add it to Apple Music.

Free · no signup2 free files a day100% in-browser · no upload

Tap to select WMV files

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2 free files per day (2 left today) · Up to 10 MB each · Upgrade for more

✓ Files never uploaded✓ 100% browser-based✓ No account required

How to convert WMV to M4A online

  1. 1

    Drop your WMV file

    Drag your Windows Media Video file onto the box above, or click it to pick a file.

  2. 2

    Wait a few seconds

    Conversion starts on its own and runs on your device, not on a server.

  3. 3

    Download your M4A

    Click Download to save the MPEG-4 Audio file.

WMV vs M4A: format overview

WMV

Windows Media Video

Microsoft · 2003

Compression
lossy
Transparency
No
  • ✓ Good compression for Windows-native workflows
  • ✓ DRM support for content protection
  • ✗ Not supported on macOS, iOS, Android natively
M4A

MPEG-4 Audio

Apple / MPEG Group · 2001

Compression
lossy
Transparency
No
  • ✓ Better quality than MP3 at same bitrate (AAC codec)
  • ✓ Native Apple ecosystem support

WMV magic bytes: 30 26 B2 75 8E 66 CF 11

M4A magic bytes: 00 00 00 xx 66 74 79 70 4D 34 41

Why convert WMV to M4A?

WMV files recorded on Windows systems carry audio as Windows Media Audio — a codec that Apple's entire ecosystem has always rejected. QuickTime cannot open WMV. iTunes will not import it. Your iPhone cannot play it. If you have recordings, lectures, or presentations in WMV format that you want to enjoy or archive in Apple's ecosystem, the WMA codec is the exact barrier standing in the way.

M4A is Apple's native audio format — AAC audio in an MPEG-4 container. It is the format iTunes uses for purchased music, the format Apple Music streams, and the format that syncs natively to every iPhone, iPad, and Mac. It supports metadata and cover art in the way Apple tools expect, and it plays over AirPlay and in CarPlay without any conversion or plugin on the device.

This converter extracts the audio from your WMV, decodes the WMA, and packages it as M4A. The result is a file that imports directly into iTunes or Apple Music with no extra steps. Audio quality matches the original WMA source at the quality level it was recorded. For the vast majority of spoken-word and corporate audio content, this is perfectly adequate. File sizes are compact — a good match for a music library where storage matters.

Quality & file size: WMV to M4A

Typical sizes: WMV 50–150 MB (1 minute 720p); M4A 3–6 MB (3-minute song).

M4A output is encoded at 192 kbps.

Re-encoding one lossy format into another adds a second round of compression.

Frequently asked questions

Can I import WMV-sourced M4A into Apple Music or iTunes?
Yes — M4A is Apple's native audio format and imports directly into Apple Music and iTunes. The converted file will appear in your library and can be synced to any Apple device.
What quality M4A output can I expect from a WMV source?
Quality is limited by the source WMV's audio bitrate. High-quality WMV (e.g., 192 kbps WMA) will produce excellent M4A output. Low-quality WMV sources (e.g., 64 kbps WMA) will produce M4A with the same limitation.

Your WMV file never leaves this tab — FormatDrop has no endpoint that receives file data. How it works