MP4 to WMA Converter

Convert MP4 to WMA Online

MP4 is a video container; WMA (Windows Media Audio) is an audio-only format Microsoft introduced in 1999. This tool pulls the audio track out of your MP4 and re-encodes it as a WMA file — handy when you need a clip to play in legacy Windows Media Player, an older Windows-based car stereo, or a Windows Mobile device that expects Microsoft's native audio format. You pick the codec version and bitrate; we handle the extraction and encoding.

How to Convert MP4 to WMA

1. Upload Your MP4 File: Drag and drop your file onto the page or click "Add Files" to browse. MP4 and M4V inputs are both accepted, and you can queue several clips to convert with the same settings.
2. Pick the Audio Codec: Open Advanced Options and set Audio Codec to WMA v2 (the default — the slightly improved 1999 revision) or WMA v1 for maximum backward compatibility with very old decoders. Both are the lossy Windows Media Audio Standard codecs.
3. Set Quality Preset or Bitrate: Leave Quality Preset on a high setting for everyday use, or switch to Constant Bitrate / Custom Bitrate to lock a specific rate. WMA Standard targets CD-grade quality in the 64–192 kbps range.
4. Convert and Download: Click Convert, then download your WMA file. No sign-up, no watermark.

WMA vs MP3 for Extracted Audio

If you only need the audio and aren't tied to the Windows Media ecosystem, MP3 is the safer default — it plays nearly everywhere. Choose WMA when a Windows-only target specifically asks for it.

Frequently Asked Questions

Why would I convert MP4 to WMA instead of MP3?

Almost always for compatibility with an older Microsoft target — Windows Media Player on an aging PC, a Windows Mobile handset, or a car head unit that lists WMA but not newer formats. Microsoft itself notes WMA's compatibility is strong inside the Windows ecosystem but limited outside it, so if your device plays MP3, MP3 is the more future-proof choice. If you already have WMA files and later want broader playback, you can convert WMA to MP3.

Does this output WMA Pro or WMA Lossless?

No. The converter produces standard lossy Windows Media Audio using the WMA v1 or WMA v2 codec. WMA Pro (24-bit / multichannel) and WMA Lossless are separate Microsoft codecs aimed at high-resolution and archival use; they aren't part of this MP4-to-WMA path. For lossy stereo audio extracted from a video, WMA v2 is the right tool.

Will I lose quality converting MP4 audio to WMA?

Some, yes. The audio inside an MP4 is usually already AAC, so going to WMA is a lossy-to-lossy re-encode and you can't recover detail that AAC discarded. In our testing, a 4-minute 1080p MP4 with AAC audio produced roughly a 3.7 MB WMA at 128 kbps — and at 128 kbps or higher the difference is hard to hear on typical speakers. Encode at the highest preset your target device accepts to keep the loss minimal.

What sample rate and channels does WMA Standard support?

Per Microsoft's codec documentation, Windows Media Audio Standard encodes up to 48 kHz at 16-bit with up to two discrete channels (stereo). If your MP4 carries 5.1 surround, the standard WMA output here will be folded down to stereo — multichannel WMA requires the separate WMA Pro codec, which this tool does not emit.

Is there a file size limit, and is my upload private?

The practical limit is upload size and time rather than a hard cap — a long 4K clip takes longer to send than a short one. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There's no sign-up, no watermark, and your files are never shared or made public. If you'd rather have a smaller, universally playable file instead, extract the audio to MP3.