WMA to AIFF

Drag and drop your WMA files onto the drop area on this page, or click it to browse and choose them, and conversion to AIFF starts automatically — there is no output format to pick and no convert button to press, because this page only converts WMA to AIFF. You can add several files at once, and they are processed one after another. Each finished file appears as a row showing its new filename and size, with an inline preview player and a Download button. Everything runs in your browser through a WebAssembly build of FFmpeg, so your audio is never uploaded to a server.

No. Converting WMA to AIFF cannot improve your audio, because WMA is a lossy format and the detail its encoder threw away is gone for good; AIFF simply stores whatever the WMA already contains as uncompressed PCM, so nothing more is lost from this point on but nothing is recovered either. The trade-off is size: uncompressed AIFF runs around 10 MB per minute of CD-quality stereo, so the file will grow many times larger than the WMA. Convert to AIFF when a Mac app or workflow needs PCM, not as a quality upgrade.

WMA is Microsoft's own audio format and it is poorly supported outside Windows, so iPhones, the Music app and most Mac software will not open a .wma file at all; the same is true of most Android music apps and car stereos. That mismatch is the usual reason people convert WMA in the first place. AIFF is Apple's own uncompressed format, so it opens natively in Mac audio software and in Logic Pro.

There is no size limit imposed by this site, because your files never leave your device — the only real ceiling is how much memory your browser and device have available, and there is no upload wait or queue to sit through either. Very large files, roughly over a few hundred megabytes, can be slow or run out of memory on a phone. For long recordings such as lectures or interviews, use a desktop browser, and remember AIFF output is much bigger than the WMA input.

Yes on both counts: the converter is completely free with no signup, no account, no watermark and nothing to install, and it is private because the conversion runs inside your own browser, so your WMA files are never uploaded to any server. That makes it safe for confidential audio such as interviews, meeting recordings or client material. It works in any modern browser on Windows, Mac, Linux, iPhone and Android.

AIFF is uncompressed PCM audio, so there is no bitrate to choose: every sample is written out in full rather than squeezed down by an encoder, which is why the bitrate selector only appears when you pick a lossy output such as MP3, AAC, M4A or OGG. With AIFF you just convert and download. The file size is set by the sample rate and channel count instead, which works out at roughly 10 MB per minute for CD-quality stereo.

Choose AIFF if you need uncompressed PCM for Logic Pro or an older Mac audio workflow that expects it, and FLAC if you mainly want to archive the audio; FLAC is also lossless but compresses to roughly 50-60% of the uncompressed size, so it stores the exact same samples in a much smaller file. Neither one will improve your lossy WMA source. If you only need the audio to play everywhere — phone, car stereo, cheap player — MP3 or M4A is the more practical target.