Convert Windows Media Audio (.wma) to Audio Interchange File Format (.aiff) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .wma file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .aiff file when it's ready.
WMA is Microsoft's lossy audio codec, delivering compressed audio at typical bitrates of 64-320 kbps within the ASF container. AIFF (Audio Interchange File Format) is Apple's uncompressed PCM audio container, storing raw audio samples at full fidelity. AIFF was introduced by Apple in 1988 and remains the native uncompressed format for macOS audio workflows.
Converting WMA to AIFF decodes the compressed WMA audio back to raw PCM samples and stores them in the AIFF container. This prepares the audio for professional editing in Logic Pro, GarageBand, or Pro Tools, where uncompressed input prevents cumulative generation loss during processing.
Professional audio editing requires uncompressed source files. When you apply effects, normalize levels, or mix audio in a DAW, each operation on a compressed file risks compounding artifacts. AIFF provides the uncompressed PCM baseline that professional software expects. Converting WMA to AIFF is necessary when WMA recordings must enter an Apple-based production pipeline.
AIFF is also the expected delivery format for some mastering facilities and broadcast systems on macOS. If a client sends you WMA files and your studio runs Logic Pro, converting to AIFF ensures smooth import and editing.
FFmpeg demuxes the ASF container, decodes the WMA audio stream to PCM (signed 16-bit or 24-bit), and writes the samples into an AIFF container with big-endian byte order. The output preserves the decoded sample rate (commonly 44.1 kHz or 48 kHz) and channel layout. A 128 kbps WMA file at 4 minutes (~4 MB) expands to approximately 40 MB as 16-bit 44.1 kHz stereo AIFF.
The WMA-to-AIFF conversion itself is lossless — every sample decoded from WMA is preserved exactly in AIFF. However, the AIFF cannot restore frequencies or detail that WMA compression discarded. The output sounds identical to the WMA source but takes up significantly more space. Think of AIFF as a perfect snapshot of what the WMA codec preserved.
| Device | WMA | AIFF |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
WMA to AIFF conversion prepares Windows-compressed audio for professional editing in Apple DAWs. The decoded audio is stored losslessly, though quality remains limited by the WMA source.
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| No |
| Funktion | WMA | AIFF |
|---|---|---|
| Fulde navn | Windows Media Audio | Audio Interchange File Format |
| Filendelse | .wma | .aiff |
| Bedst til | Windows native | Lossless quality |