Is this WMV to AAC converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple WMV files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

What bitrate will the converted audio use?

We default to 192 kbps for MP3, 128 kbps for OGG/Opus, and 320 kbps for M4A/AAC. These settings are perceptually transparent — most listeners can't tell the difference in a blind test.

Will my metadata (ID3 tags, album art) be preserved?

Yes, when both formats support it. Tags carry over on conversions like MP3→M4A or FLAC→MP3. WAV has limited tag support, so some metadata may not transfer.

What is WMA and why can't Apple devices play it?

WMA (Windows Media Audio) is Microsoft's proprietary lossy audio codec. Apple devices do not include a WMA decoder, so WMV/WMA content is silent or won't open on iPhone, iPad, or Mac.

Does converting WMV to AAC produce good audio quality?

At 192+ kbps AAC, the output is excellent for most content. The quality ceiling is set by the source WMA's bitrate; high-quality WMV sources produce good AAC output.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

WMV to AAC Converter — Free, Online, No Upload

How to convert WMV to AAC online

1
Drop your WMV file
Drag and drop your Windows Media Video file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Windows Media Video → Advanced Audio Coding entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your AAC
Your Advanced Audio Coding file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

WMV vs AAC: format overview

WMV

Windows Media Video

Microsoft · 2003

Compression: lossy
Transparency: No

✓ Good compression for Windows-native workflows
✓ DRM support for content protection
✗ Not supported on macOS, iOS, Android natively

AAC

Advanced Audio Coding

Dolby, Fraunhofer, Sony, Nokia · 1997

Compression: lossy
Transparency: No

✓ Successor to MP3 — better quality at same bitrate
✓ Native support across Apple, Android, YouTube

WMV magic bytes: 30 26 B2 75 8E 66 CF 11

AAC magic bytes: FF F1 (ADTS) / 00 00 00 xx 66 74 79 70

Why convert WMV to AAC?

WMV and its companion codec WMA are Windows-native formats that have been explicitly dropped by every major platform outside of Microsoft's ecosystem. Chrome, Firefox, Safari, and Edge have all removed or never added WMA decoding support. Apple devices do not decode it natively. Android devices require additional codec packages. Corporate training videos, e-learning content, and recorded presentations distributed as WMV leave non-Windows users with nothing to play.

AAC solves all of that. It is the codec built into every iPhone, iPad, Android device, Mac, and modern browser. YouTube, Spotify, and Apple Music all use AAC internally. It is more efficient than MP3 — better sound at smaller file sizes — and carries no licensing friction for end users.

Converting WMV audio to AAC breaks you out of the Windows-only codec trap. The converter decodes the WMA audio and re-encodes it as AAC. The output is a compact, universally compatible audio file that plays anywhere without plugins or special software. Quality depends on the source WMA bitrate — for speech and voice content typical of corporate video, the AAC output at standard bitrates is more than sufficient. This is particularly useful for e-learning platforms and content management systems that require web-native formats.

Quality & file size: WMV to AAC

Typical file sizes: WMV 50–150 MB → AAC 2–5 MB.

Both WMV and AAC use lossy compression. We transcode at high quality settings (equivalent to AAC's recommended web quality) to minimize generational loss.

Color depth: WMV supports standard color, AAC supports standard color.

Transparency: WMV does not support transparency. AAC does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your WMVfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.