Convert WMA to AAC
Convert any audio file to AAC format online for free. Fast, secure, and easy-to-use audio to AAC converter with no software installation required.
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Max file size: 50 MBMax duration: 30 min
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Why Choose Scriptivox WMA to AAC Converter?
Fast Conversion
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Your files are encrypted and automatically deleted after conversion. We never store or share your data.
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Works directly in your web browser. No software download or installation required.
How to Use WMA → AAC
Upload File
Drag and drop your WMA file or click to browse. Supports files up to 1GB.
Convert
Select AAC as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
WMA vs AAC: format comparison
How the two formats differ on the things that change your result.
| Specification | WMA (source) | AAC (result) |
|---|---|---|
| Container | ASF | ADTS / raw AAC |
| Developed by | Microsoft | MPEG / Fraunhofer IIS |
| Introduced | 1999 | 1997 |
| Audio codecs | WMA, WMA Pro | AAC-LC, HE-AAC |
| Compression | Lossy | Lossy |
| Typical bitrate | 64–192 kbps | 96–256 kbps |
| Max sample rate | 48 kHz | 96 kHz |
| Max channels | 8 | 8 |
| Gapless playback | No | Partial |
| Metadata / tags | ASF / WM tags | ID3v2 (limited in ADTS) |
| Approx. file size | 0.48–1.44 MB per minute | 0.72–1.92 MB per minute |
| Licensing | Proprietary | Patent-licensed |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | Windows media libraries, legacy archives | streaming services, mobile playback, broadcast |
What changes when you convert WMA to AAC
Both WMA and AAC are lossy, so this conversion decodes WMA and re-encodes it as AAC-LC. That second encode adds its own loss on top of the first. Choosing a higher bitrate, up to 256 kbps, keeps the damage small enough to be inaudible in most material.
Compatibility is the main win here: AAC plays natively on 5 more of the platforms we track than WMA does, so the result works without asking anyone to install a player.
The two formats are aimed at different jobs. WMA is typically used for Windows media libraries, legacy archives, while AAC is the usual pick for streaming services, mobile playback, broadcast. That difference in intent is what most of the specification gaps above come from.
Expect metadata to be rewritten rather than copied: ASF / WM tags in the source becomes ID3v2 (limited in ADTS) in the result. Standard fields map cleanly; niche custom tags often do not.
About WMA to AAC Conversion
This page converts WMA files, stored in the ASF container since 1999, into AAC, which uses ADTS / raw AAC and dates from 1997. The differences between the two containers decide what changes in the result.
WMA comes from Microsoft and dates to 1999. It carries WMA, WMA Pro, which is what determines the quality ceiling of anything you convert out of it.
AAC was introduced by MPEG / Fraunhofer IIS in 1997. It carries AAC-LC, HE-AAC and has native playback on 6 of six platform categories, which is the practical reason to choose it as a target.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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