Step 1: Transfer your WMA files using the button above or by slide and deposit.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Retrieve your converted AAC files.
WMA to AAC Conversion FAQ
How do I convert WMA audio to AAC without losing quality?
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Upload the WMA file and the converter chooses the AAC codec and bitrate to match the source. Lossless AAC (WAV / FLAC / ALAC) preserves every sample bit-identically; lossy AAC (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for most ears. WMA is lossy by default, in an ASF container, with lossless and voice-optimised variants that are rarely encountered. AAC is lossy but more efficient than MP3, and it handles up to 48 channels natively rather than being bolted onto a stereo design.
Is converting WMA to AAC a second round of lossy compression?
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Yes, and it is worth planning around. Both formats are lossy, so the AAC encoder is working from audio that has already been through one psychoacoustic pass, and its own decisions compound the first set. At 192 kbps or above the result is still transparent for most listening. If you have a lossless master anywhere, encoding the AAC from that instead avoids the double pass entirely.
Why will some of my WMA files not convert?
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DRM. A subset of WMA files are encrypted by the store or the software that issued them, and encrypted audio cannot be decoded by any converter. Anything you ripped yourself, recorded, or bought without protection converts normally; a licensed purchase will not. WMA is unsupported almost everywhere outside Windows, and older WMA files may carry DRM that blocks conversion entirely.
What bitrate will the resulting AAC file use?
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Default is 192 kbps for lossy AAC; pass-through for lossless AAC. Override to 320 kbps for audiophile or 96 kbps for voice / podcast. The choice trades file size against audible fidelity; below 96 kbps lossy artifacts become noticeable on music.
Will going from WMA to AAC reduce my audio quality?
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If WMA is lossy and AAC is lossless (e.g. MP3 → WAV), the AAC is no better than the WMA — you cannot recover information already discarded. If WMA is lossless and AAC is lossy, the AAC codec recompresses; at 192 kbps the result is transparent for most content.
Does the WMA to AAC converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, and album art are read from the WMA container and written into the AAC container where the format supports tags. All common targets (MP3, AAC, FLAC, OGG) handle tags fine; raw WAV does not. AAC is Advanced Audio Coding, standardised in 1997 as MPEG-2 Part 7 and designed explicitly to replace MP3.
Can I batch convert hundreds of WMA files to AAC?
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Yes — drop a folder of WMA files in and we process them in parallel. Premium has more parallel workers and no per-file size cap, so a 500-file batch finishes in minutes rather than tens of minutes.
Will the AAC keep the same sample rate as WMA?
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By default yes — 48 kHz WMA stays 48 kHz in AAC. If you need to downsample for compatibility (96 kHz → 44.1 kHz for CD burning), the sample-rate option applies high-quality resampling in the same encode pass.
Can I normalize loudness when converting WMA to AAC?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AAC, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard). Useful when batching tracks mastered at varying levels.
Will my AAC play on car stereo, iPod, and Sonos?
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MP3 plays everywhere. AAC plays on Apple, most Android, and Sonos. FLAC plays on Sonos and Android but not on older iPods. WAV plays on everything but is huge. The advanced device-preset dropdown picks an AAC codec optimized for your target hardware. AAC sounds noticeably better than MP3 below 128 kbps and is the default audio track in MP4, YouTube, Apple Music and broadcast. AAC is patent-encumbered, and a handful of very old players still refuse it where they would accept an MP3.
Is my WMA file private during conversion to AAC?
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Yes — uploaded WMA files are processed in isolated workers and deleted within minutes. We never play back, store long-term, or share the audio content. The full retention window is in /privacy/.
How long does converting a 1-hour WMA to AAC take?
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Same-codec re-mux: 10 to 30 seconds. Re-encode to a different codec: typically 10 to 20% of source duration, so a 1-hour WMA → AAC finishes in 6 to 12 minutes. Batch jobs parallelize across workers for further speedups.
