Step 1: Provide your WMA files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch 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 / bitrate combination that matches the source profile. Lossless AAC (WAV / FLAC / ALAC) preserves every sample exactly; lossy AAC (MP3 / AAC / OGG / Opus) defaults to 192 kbps which is transparent for almost all music content. 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 does the AAC file end up at?
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Default 192 kbps for lossy AAC; pass-through for lossless AAC. Override to 320 kbps if you want maximum lossy fidelity, 128 kbps for size-constrained podcast distribution, or 96 kbps for voice-only sources where the smaller file matters more than studio detail.
Will going from WMA to AAC actually reduce my audio quality?
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If WMA is lossy (MP3, AAC) and AAC is lossless (WAV, FLAC), the AAC is no better than the WMA — you cannot recover information already discarded by the lossy WMA codec. If WMA is lossless and AAC is lossy, expect the AAC encoder to recompress; at 192 kbps the loss is imperceptible to most ears.
Does the WMA to AAC converter keep ID3 / metadata tags?
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Yes — title, artist, album, year, track number, album art, BPM, replay-gain are read from the WMA container and written into the equivalent fields on the AAC container. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC, M4A), RIFF INFO (WAV), iXML chunks all map cleanly. 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 into 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. Folder structure is preserved in the output ZIP.
Will the AAC keep the same sample rate as the WMA?
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By default yes (a 48 kHz WMA produces 48 kHz AAC, a 44.1 kHz WMA produces 44.1 kHz AAC). For specific compatibility — e.g. downsampling 96 kHz studio masters to 44.1 kHz AAC for CD burning, or upsampling 22 kHz voicemail to 44.1 kHz AAC — the sample-rate dropdown applies high-quality SOX-style resampling.
Can I normalize loudness in the WMA to AAC step?
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Yes — the loudness-normalize option applies ITU-R BS.1770 / EBU R128 normalization to the AAC output, targeting -14 LUFS (streaming standard) or -16 LUFS (podcast standard) or a custom value. Useful when batch-converting tracks with varying mastering levels into a single AAC playlist.
Will the AAC play on my car stereo / iPod / Sonos / Bluetooth speaker?
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MP3 plays universally on every device made in the last 20 years. AAC plays on Apple, most Android, Sonos, and modern car stereos. FLAC plays on Sonos and recent Android, less well on older iPods. WAV plays on everything but the file is huge. The device-target dropdown picks a safe AAC codec for the platform you specify. 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?
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Yes — uploaded WMA files are processed in isolated workers and deleted within minutes. We never play, store, or share the audio content. The pipeline runs on hardware we control end-to-end; no third-party services receive your file.
How long does converting a 1-hour WMA to AAC take?
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Same-codec re-mux (e.g. AAC inside M4A -> AAC inside MP4): 10-30 seconds. Codec change (e.g. FLAC -> MP3 or WAV -> AAC): typically 10-20% of source duration, so a 1-hour WMA -> AAC finishes in 6-12 minutes on the standard pipeline.
