M4A to WMA Converter

Convert M4A to WMA online, for free.

or drag and drop files here

Maximum file size is 1GB

How it works

Three steps to your converted file

No software to install, no account to create. RunConvert runs entirely in the browser and handles the conversion in the cloud.

Upload your file

Drag and drop any file, click to browse, or paste a URL. Supports 300+ input formats across video, audio, image, document, and archive types.

Choose an output format

Pick from hundreds of output formats. Filter by category or search by name - no sign-ups, no paywalls, just instant access to every option.

Convert & download

Click Convert and your file is ready in seconds. Files are processed on secure cloud servers and automatically deleted after a few hours.

What is an M4A file?

The M4A file extension denotes an audio-only MPEG-4 container, defined by ISO/IEC 14496-14 standards and typically encoded using Advanced Audio Coding (AAC) or Apple Lossless (ALAC). Originally popularized by Apple to differentiate audio content from standard .MP4 video files, the container utilizes an atom-based structure (e.g., ftyp, moov, mdat) to store audio streams and metadata. It serves as the successor to MP3, offering superior compression efficiency and fidelity at equivalent bitrates.

How to open an M4A file

M4A files are natively supported by the Apple ecosystem (iTunes, QuickTime, iOS Music) and Windows Media Player on modern Windows versions. Cross-platform compatibility is robust, with VLC Media Player, Audacity, and Winamp providing decoding capabilities. On Android devices, native players often handle M4A, though third-party apps like Poweramp ensure compatibility with ALAC-encoded variants.

M4A Technical Info

Full Name: MPEG-4 Audio
Developed By: Apple Inc. / MPEG
Initial Release: 2001
MIME Type: audio/mp4

What is a WMA file?

Windows Media Audio (WMA) refers to a series of audio codecs and their corresponding Microsoft container format, designed as a competitor to MP3 and RealAudio. The standard WMA codec is lossy, but the format family includes WMA Lossless, WMA Pro (multichannel), and WMA Voice. It utilizes the Advanced Systems Format (ASF) container structure and supports digital rights management (DRM), which historically restricted playback to authorized Windows devices.

How to open a WMA file

WMA files are native to the Windows ecosystem and open by default in Windows Media Player and Movies & TV. macOS users require third-party components like Flip4Mac (legacy) or universal players such as VLC Media Player and Elmedia Player to decode the stream. Android and Linux support is generally provided via VLC or by installing ffmpeg-based media libraries.

WMA Technical Info

Full Name: Windows Media Audio
Developed By: Microsoft
Initial Release: 1999
MIME Type: audio/x-ms-wma

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert M4A to WMA in seconds

Every M4A to WMA conversion runs in the cloud - no software to install, no quality compromises.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

256-bit SSL encryption in transit. We never share your files and automatically delete all uploads after processing.

Free - no account needed

Convert files without signing up. No usage limits, no credit card, no hidden fees - full access, always free.

Developer API

Convert M4A to WMA via API

Automate M4A to WMA conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "m4a-to-wma",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "wma"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.m4a

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.