MP4 to WMA Converter

Convert MP4 to WMA Online

MP4 is a video container; WMA (Windows Media Audio) is an audio-only format Microsoft first shipped on August 17, 1999 as part of Windows Media Technologies 4.0. This tool pulls the audio track out of your MP4 and re-encodes it as a WMA file — the practical reason to do this is a legacy Microsoft target: Windows Media Player on an older PC, a Windows-based car head unit, or an embedded device that lists WMA but not newer codecs. If your target device also plays MP3 or AAC, one of those is the more future-proof choice, and this page is honest about when to make that call.

WMA Format at a Glance

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 the Audio Codec to WMA v2 (the default, the slightly refined 1999 revision) or WMA v1 for maximum backward compatibility with very old decoders. Both are lossy Windows Media Audio Standard codecs — this path does not emit WMA Pro or WMA Lossless.
3. Set Quality Preset, Bitrate, or Channels: Leave Quality Preset on a high setting (Very High is the recommended default) for everyday use, or switch to Constant Bitrate, Custom Bitrate, or Variable Bitrate to lock a specific rate. Audio Channel and Audio Sample Rate default to "Original"; a 5.1 source will fold to stereo because WMA Standard tops out at two channels.
4. Convert and Download: Click Convert, then download your WMA file. No sign-up, no watermark.

WMA vs MP3 vs AAC for Extracted Audio

The audio inside an MP4 is almost always AAC, so any conversion here is a lossy-to-lossy re-encode. If you are not tied to the Windows Media ecosystem, MP3 or AAC will play on far more hardware. Use this table to decide before you commit to WMA.

When WMA Makes Sense — and When It Doesn't

• Pick WMA when a specific Windows-era device or player asks for it by name and won't accept MP3 or AAC.
• Pick MP3 when you want one file that plays on virtually every phone, car stereo, and speaker made in the last 25 years.
• Pick AAC when you care about the best quality per kilobyte, or your source is 5.1 surround that you don't want folded down to stereo.
• Already have WMA files and later need broader reach? You can convert WMA to MP3 without going back to the video.

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-based car head unit, or an embedded device that lists WMA but not newer codecs. Because WMA's real strength is inside the Windows ecosystem and thin outside it, MP3 is the more future-proof pick whenever your device actually supports it. 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 (16/24-bit, up to 96 kHz and 7.1 channels) and WMA Lossless are separate Microsoft codecs aimed at high-resolution and archival use, and they are not 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 cannot 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?

WMA 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. If keeping surround matters, extract the audio to AAC instead.

What's the difference between WMA v1 and WMA v2?

Both are the lossy Windows Media Audio Standard codec; v2 is the slightly refined revision that became the common default and is what most WMA files in the wild use. WMA v1 exists mainly for compatibility with very early decoders. Unless a specific ancient device rejects v2, leave the default on WMA v2 — it is the safer, better-supported choice for everyday extraction.

What plays WMA files on Mac, iPhone, or Android?

WMA plays natively on Windows through Windows Media Player, but Apple and Android platforms do not decode it out of the box. On macOS, iOS, or Android you generally need a third-party player such as VLC, or you convert the file to MP3 or AAC first. This is the core reason to think twice before choosing WMA if the file will ever leave a Windows machine.

Does the video get removed — is this audio-only?

Yes. MP4-to-WMA is an audio extraction: the video track is discarded and only the audio is re-encoded into the WMA (ASF) container. Skipping the video is also why audio-only conversions finish faster than a full video transcode — there is no picture to re-render.

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 is no sign-up, no watermark, and your files are never shared or made public. If you would rather have a smaller, universally playable file, extract the audio to MP3 instead.