I switched from Windows to Mac — will this help?

Yes. This is the exact conversion you need. WMA files are not natively supported on macOS, and converting to M4A gives you full Apple ecosystem compatibility.

Will my Windows Media Player metadata transfer?

Yes. Track titles, artists, albums, genres, and other metadata from WMA are mapped to M4A's iTunes-compatible tag format.

Is M4A better quality than WMA?

M4A uses AAC, which is generally more efficient than standard WMA. While transcoding introduces a generation loss, the AAC codec makes good use of the available bitrate.

Can I import the M4A files into Apple Music?

Yes. M4A is Apple Music's native format. The converted files integrate seamlessly into your Apple Music library on Mac, iPhone, and iPad.

Will DRM-protected WMA files convert?

No. DRM-protected WMA files from legacy music stores cannot be converted. Standard unprotected WMA files from CD rips or recordings convert without issues.

WMA to M4A Converter

Switching from Windows to Apple means your WMA music library needs to be in M4A format. Converting WMA to M4A brings your legacy Microsoft audio into Apple's ecosystem, making every track playable in iTunes, on iPhones, and through Apple Music with proper metadata and artwork support.

100% Private — Your files never leave your device

Convert M4A to WMA instead

WMA to M4A transcodes from Microsoft's codec to Apple's AAC codec. Both are lossy, so a generation loss occurs. However, AAC is the more efficient codec, and at typical bitrates the output closely approximates the original WMA quality.

How to Convert WMA to M4A

1
Upload your WMA audio file to the converter.
2
Select M4A as the desired output format.
3
Click Convert and download your Apple-ready M4A file.

WMA vs M4A — Format Comparison

Feature	WMA	M4A
Full Name	Windows Media Audio	MPEG-4 Audio
Type	Audio	Audio
Codec	WMA Standard / WMA Pro / WMA Lossless	AAC / ALAC
Lossless	No	No
Extension	.wma	.m4a
Best For	Legacy Windows music libraries	Apple Music and iTunes library

WMA Strengths

Good compression at low bitrates
Native Windows support
DRM support for protected content

M4A Strengths

Superior audio quality to MP3 at same file size
Native support on all Apple devices and iTunes
Supports both lossy (AAC) and lossless (ALAC) audio

Frequently Asked Questions

When to Convert WMA to M4A

Migrating a Windows Media Player library to iTunes after switching to Mac
Making legacy WMA collections playable on iPhones and iPads
Converting WMA audiobooks for Apple Books compatibility
Preparing Windows-era music files for AirPlay and HomePod playback

Related Conversions

WMAMP3 WMAWAV WMAAAC WMAFLAC MP3M4A WAVM4A AACM4A FLACM4A

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About Our WMA to M4A Converter

This converter uses FFmpeg compiled to WebAssembly (WASM) to transform your WMA files into M4A format entirely inside your web browser. When you select a file for conversion, the processing happens locally on your device. Your file is never uploaded to any server, never transmitted over the internet, and never stored anywhere outside your own computer. This privacy-first architecture makes our tool safe for confidential and sensitive content — including legal recordings, medical files, financial presentations, personal media, and any other material you would not want on a third-party server.

The conversion process works by decoding the WMA input using FFmpeg's highly optimized decoders, then encoding the output in M4A format with carefully tuned settings that balance quality and file size. When possible, the tool uses stream copy mode to remux (rewrap) compatible streams without re-encoding, which preserves the original quality with zero generational loss. When re-encoding is necessary due to codec differences between the two formats, the converter uses high-quality encoding settings to minimize any visible or audible quality reduction.

Supported input formats include MP3, WAV, AAC, FLAC, and OGG for audio, with automatic detection of the codecs and parameters inside your source file. The output is optimized for maximum compatibility with modern devices and platforms including Windows, macOS, Linux, iOS, Android, smart TVs, and all major web browsers.

Why browser-based conversion is safer: traditional online converters require you to upload your file to a remote server, where it is processed by third-party infrastructure and then made available for download. This workflow exposes your data to interception during upload, unauthorized access on the server, unclear data retention policies, and potential data breaches. Professionals in regulated industries such as healthcare (HIPAA), legal (attorney-client privilege), and finance (SOX, GDPR) often cannot use server-based converters without violating compliance requirements. Our WebAssembly-powered approach eliminates all of these risks by ensuring your data never leaves the browser sandbox on your own device.

The tool handles files up to 500 MB on desktop browsers and 200 MB on mobile devices. No account registration, no software installation, and no recurring subscription is required. Conversion typically completes in seconds for small files and a few minutes for larger ones, depending on your device's processing capabilities. Once the conversion is finished, you can download the result immediately and the source data is discarded from browser memory.