WMA を AAC に変換

Free online WMA to AAC converter. Fast, secure, no signup required.

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Accepted: WMA files · Max 100 MB per file

wma aac

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Need to convert WMA to AAC? MegaConvert makes it easy. Upload your Windows Media Audio (WMA) file and get a Advanced Audio Coding (AAC) file in seconds — no software to install, no signup required. Whether you need this conversion for music playback, podcasting, device compatibility / web streaming, our online converter handles it instantly. Free for files up to 25MB, with support for larger files up to 2GB.

How to Convert WMA to AAC Online

1
Upload your WMA file
Click the upload area or drag and drop your WMA file. Files up to 25MB are free. Larger files are supported with pay-per-use.
2
Choose AAC as output format
AAC is automatically selected on this page. You can adjust conversion settings if needed.
3
Click Convert
Hit the Convert button to start processing. Your file will be converted using our high-performance servers.
4
Download your AAC file
Once conversion is complete, click Download to save your new AAC file. Free files are available for 1 hour.

Why Convert WMA to AAC?

**Modernize your files** — WMA is an older format. Converting to AAC ensures better compatibility with current software and devices.
**Reduce file size** — Converting between formats can significantly reduce file size, making files easier to share via email or cloud storage.
**Software requirements** — Your software or platform may require AAC format specifically. Converting ensures full compatibility.

WMA vs AAC — Format Comparison

Feature	WMA	AAC
Full Name	Windows Media Audio	Advanced Audio Coding
Developer	Microsoft	Fraunhofer Society, Dolby, Sony, Nokia, and others
First Released	1999	1997
Category	Audio	Audio
Extension	.wma	.aac
MIME Type	audio/x-ms-wma	audio/aac

Converting from lossy to lossless does not improve quality. Start from lossless source when possible.

About WMA Format

Microsoft's audio compression format competing with MP3 and AAC.

Full name: Windows Media Audio

Developer: Microsoft (1999)

About AAC Format

Lossy audio codec offering better quality than MP3 at similar bit rates.

Full name: Advanced Audio Coding

Developer: Fraunhofer Society, Dolby, Sony, Nokia, and others (1997)

よくある質問

Upload your WMA file to MegaConvert.io, select AAC as the output format, and click Convert. Your converted file will be ready to download in seconds. No software installation required.

Yes! Files up to 25MB can be converted for free, up to 3 times per day. For larger files, pay-per-use pricing starts at just $2 for files up to 100MB.

Absolutely. All uploaded files are encrypted in transit (HTTPS), scanned for viruses, and automatically deleted after conversion. We never share or access your files.

Free users can convert files up to 25MB. Pay-per-use supports files up to 2GB. Subscribers get up to 2GB with priority processing.

Microsoft's audio compression format competing with MP3 and AAC. Developer: Microsoft (1999).

Lossy audio codec offering better quality than MP3 at similar bit rates. Developer: Fraunhofer Society, Dolby, Sony, Nokia, and others (1997).