WMA to AAC Converter
Convert WMA to AAC online — fast, secure, watermark-free. No signup required.
auto-delete in 24h · no signup · no watermark
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How to convert WMA to AAC online
- Click "Browse Files" or drag your WMA file into the converter above (up to 200 MB free, 500 MB with an account).
- The target format is preset to AAC — adjust quality options in the picker if you need to.
- Hit "Convert". Your file uploads over an encrypted connection and converts automatically in the cloud — nothing to install.
- Click the green "Download" button to save your AAC file. The original is deleted immediately and the result auto-deletes after 24 hours.
That is the entire flow — no email address, no software install, no watermark on the output. The page you are reading handles WMA to AAC from start to finish.
What's the difference between WMA and AAC?
WMA (Windows Media Audio) and AAC (Advanced Audio Coding) solve different problems: WMA is a lossy compression format built for legacy Windows audio files, while AAC is a lossy compression format whose strength is streaming audio, YouTube, mobile devices. In practice you will meet WMA when dealing with legacy Windows audio files, and reach for AAC when you need streaming audio, YouTube, mobile devices — the table below compares them point by point.
| WMA | AAC | |
|---|---|---|
| Full name | Windows Media Audio | Advanced Audio Coding |
| Developed by | Microsoft | MPEG (Fraunhofer, AT&T, Sony, Dolby) |
| Released | 1999 | 1997 |
| Compression | Lossy compression | Lossy compression |
| Typical use | legacy Windows audio files | streaming audio, YouTube, mobile devices |
| File extension | .wma | .aac |
| MIME type | audio/x-ms-wma | audio/aac |
Why convert WMA to AAC?
WMA (Windows Media Audio) is a lossy audio format Microsoft released in 1999 for Windows Media Player. Once common on Windows PCs and portable players, it has faded from modern devices — phones, Macs, and car systems often cannot play WMA, which is why most people convert it to MP3. Here is when AAC is the better choice:
- →AAC is the modern streaming standard — better quality per kilobit than MP3.
- →It runs in the cloud — 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account) — so even a phone or an old laptop converts at full speed.
Before you convert: three quick tips
- ●Decide the use first: 320 kbps for critical listening, 128 kbps when size matters most, and the 192 kbps default for everything else.
- ●Core audio metadata (title, artist) carries over to AAC where the format supports it; extras like embedded cover art vary by format.
- ●Keep your original WMA — conversion never modifies it, and if you later need a different target format, starting from the original always gives the best quality.
AAC conversion settings explained
Bitrate controls the quality-versus-size tradeoff of your AAC file. Filevo defaults to 192 kbps — the sweet spot for music: about 1.4 MB per minute of audio, indistinguishable from the source for the vast majority of listeners.
How to choose: 128 kbps suits voice, podcasts, and audiobooks (≈0.96 MB per minute — fully transparent for speech); 192 kbps is the everyday music setting (≈1.4 MB per minute); 320 kbps is for archiving and critical listening (≈2.4 MB per minute, the ceiling of what the format can deliver).
Rule of thumb: when unsure, keep the default. Pick 320 kbps for a music collection you plan to keep, or 128 kbps to halve the size of a voice note before sending it.
How the conversion works
Filevo's WMA to AAC conversion is powered by FFmpeg, the open-source media framework behind much of the world's video infrastructure. We run it with compatibility-first settings tuned for everyday playback, and stream progress back to your browser in real time. Because everything runs in the cloud, your device's CPU stays idle — the browser only uploads and downloads.
What is WMA?
WMA (Windows Media Audio) is a lossy audio format Microsoft released in 1999 for Windows Media Player. Once common on Windows PCs and portable players, it has faded from modern devices — phones, Macs, and car systems often cannot play WMA, which is why most people convert it to MP3.
| Full name | Windows Media Audio |
| Developer | Microsoft |
| Released | 1999 |
| MIME | audio/x-ms-wma |
What is AAC?
AAC (Advanced Audio Coding) is a lossy audio codec standardized in 1997 as the successor to MP3. It achieves noticeably better quality at the same bitrate and powers YouTube audio, Apple Music, Android, and most streaming platforms today.
| Full name | Advanced Audio Coding |
| Developer | MPEG (Fraunhofer, AT&T, Sony, Dolby) |
| Released | 1997 |
| MIME | audio/aac |
Filevo vs other WMA to AAC converters
An honest comparison — CloudConvert and Convertio are capable tools; here is where Filevo differs:
| Filevo | CloudConvert | Convertio | |
|---|---|---|---|
| Free tier | 10/day | 10/day | 10 credits/day |
| No signup needed | Yes | Yes | Yes |
| Watermarks | None | None | None |
| Ads on free tier | No | No | Yes |
| Pricing model | 1 file = 1 credit, shown upfront | Per conversion minute | Credit packs |
Privacy & file security
Filevo deletes your uploaded WMA file immediately after conversion and removes the converted AAC within 24 hours. Everything travels over TLS encryption, processing is fully automated with zero human access, and your files are never used for AI training. See our Privacy Policy for details. Privacy Policy →
WMA to AAC converter FAQ
How do I convert WMA to AAC for free?
Drop your WMA file into the converter at the top of this page, confirm AAC as the target, click Convert, and download the result. It is genuinely free: 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account), no watermarks, no software to install, no account required.
Is it safe to convert WMA files online?
Yes. Transfers are TLS-encrypted end to end, and conversion is fully automated — no human ever sees your files. Your uploaded WMA is deleted the moment conversion finishes, and the converted AAC auto-deletes after 24 hours (you can delete it sooner). We never use your files for AI training or share them with anyone.
Will I lose quality converting WMA to AAC?
Both WMA and AAC are lossy formats, so re-encoding introduces a small generational loss. Filevo defaults to high quality settings that keep it imperceptible for typical content — just avoid converting the same file back and forth repeatedly.
How long does WMA to AAC conversion take?
Usually seconds. The conversion itself takes from under a second to a few seconds for images and audio — most of the wait is the upload, which depends on your connection speed. Since processing happens in the cloud, your device stays fast, and you can run several conversions in parallel.
Can I convert WMA to AAC on iPhone or Android?
Yes. Filevo runs entirely in the browser, so it works the same on iPhone, Android, tablets, and computers — no app to install. On mobile, tap Browse Files to pick from your photos or files.
What's the maximum file size?
Anonymous conversions accept files up to 200 MB; a free account raises that to 500 MB. Paid plans go from 1 GB up to 10 GB per file, with higher daily limits and priority queues.
Can I convert multiple files at once?
One file per conversion today — though you can start several conversions in parallel. Batch upload with zip download is on the near-term roadmap.
What will the converted file be named?
Your original name is kept and only the extension changes — holiday.wma becomes holiday.aac, so files stay easy to find.
Whether you need streaming audio, YouTube, mobile devices or simply a file that works where WMA will not open, the converter above turns WMA into AAC in seconds — free, private, and with nothing to install. Bookmark this page for the next time a WMA file refuses to cooperate.
Last updated: 2026-06-11