Step 1: Supply your AAC files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted WMA files.
AAC to WMA Conversion FAQ
Is the AAC to WMA conversion reversible?
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You can convert the WMA back to AAC on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from AAC to WMA?
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Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Is converting AAC to WMA a second round of lossy compression?
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Yes, and it is worth planning around. Both formats are lossy, so the WMA 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 WMA from that instead avoids the double pass entirely. AAC is lossy but more efficient than MP3, and it handles up to 48 channels natively rather than being bolted onto a stereo design. WMA is lossy by default, in an ASF container, with lossless and voice-optimised variants that are rarely encountered.
What exactly is a WMA file?
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A container with the audio inside it, rather than the audio on its own. That extra layer is where the length, the seek index and whatever metadata the format defines are kept, so a player knows how long a WMA is before decoding a single frame instead of scanning the whole file to find out. It also means the extension does not always settle what is inside: several containers of this kind are allowed to hold more than one sort of audio, which is why two WMA files can behave differently while looking identical from outside.
Why did my phone or tablet record in AAC?
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Because it is what the hardware encoder on the device produces. Voice memos, screen recordings and the audio track of anything filmed on a phone come out as AAC without anyone choosing it, which is why so many files arrive in it and why the quality is usually better than the file size suggests. Nothing about that stops it converting; it just means the source was encoded once already, by a chip optimised for battery life rather than for fidelity. AAC is Advanced Audio Coding, standardised in 1997 as MPEG-2 Part 7 and designed explicitly to replace MP3.
Will the WMA play in my car or on older hardware?
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Often not. AAC is decoded by essentially everything, including car head units and elderly players; WMA needs software that knows the codec, which standalone hardware frequently does not have. If the destination is a car stereo or a portable player, that is a strong argument for staying on AAC. WMA is unsupported almost everywhere outside Windows, and older WMA files may carry DRM that blocks conversion entirely.
Is there a licence attached to AAC?
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Not one you have to think about. The codec is covered by patent pools, and the licensing is settled by whoever ships the decoder — the phone, the browser, the operating system — long before a file reaches you. It is why the format is everywhere in hardware, and why royalty-free alternatives were built at all. It changes nothing about converting a file you already have, and it is only a live question if you are shipping an encoder yourself.
Why would anyone still convert to WMA?
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For one specific piece of software or hardware that will accept nothing else — which is a real situation and the only good reason. WMA belongs to an earlier generation: newer codecs do the same job at smaller sizes, general-purpose players drop support for it rather than adding it, and nothing new is being built around it. If something in the chain genuinely demands it, convert and keep the original as the master. If nothing does, convert away from it instead.
Is there a file-size limit when converting AAC to WMA?
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Free conversions have a size limit per file, set by the type of file, and the page tells you when a file is over it. A paid plan removes that limit, so much larger files can be converted.
Can I batch-convert several AAC files to WMA at once?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
What happens to my AAC files after the conversion?
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Uploaded files are processed on our own conversion servers, nobody looks at them, and they are not shared. The upload and the converted file are both deleted automatically about 24 hours after the conversion, which leaves time to download the result. See /privacy/ for the full policy.
What apps can play a WMA file?
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WMA plays in most music players, browsers, and media libraries. iTunes / Apple Music, VLC, Foobar2000, and phone media apps handle it natively.
