Add your AAC file
Drop one or more .aac files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
AAC to WAV
Re-encoding .aac audio as .wav changes how the sound is compressed and which players will accept it. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop AAC files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting AAC audio to WAV audio
Re-encoding .aac audio as .wav changes how the sound is compressed and which players will accept it. An .aac file holds raw Advanced Audio Coding data, usually as an ADTS stream. AAC was designed as MP3's successor and delivers audibly better quality at the same bitrate, though the bare .aac extension is rarer than AAC audio traveling inside .m4a or .mp4 files.
A .wav file is Microsoft's Waveform Audio format, which in practice almost always stores uncompressed PCM samples. Because every bit of the original signal is preserved and no decoding is required, .wav remains the default working format in recording studios and audio editors. For this route the practical draw is bit-perfect with zero generation loss and negligible CPU cost to read or write — balanced against enormous compared with FLAC, which halves the size losslessly, which is worth knowing before you commit a large batch.
Why convert AAC to WAV?
The practical trigger for this conversion is usually a mismatch: with .aac, raw ADTS files handle tags and cover art poorly. Switching to .wav buys you bit-perfect with zero generation loss, which is why it is the better fit for capturing and mixing sessions in a DAW. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
AAC vs WAV at a glance
| Aspect | AAC audio (.aac) | WAV audio (.wav) |
|---|---|---|
| Format type | Lossy — discards detail it judges invisible to shrink files | Lossless — every pixel or sample is preserved exactly |
| How it stores data | a pure MDCT transform codec, free of the hybrid filterbank compromise that limited MP3 | a RIFF chunk container whose fmt chunk usually declares linear PCM, though compressed codecs are technically permitted |
| Strongest at | receiving the audio track copied out of MP4 video without re-encoding | capturing and mixing sessions in a DAW |
| Weak spot | raw ADTS files handle tags and cover art poorly | enormous compared with FLAC, which halves the size losslessly |
| Metadata | no standard tag container exists for raw ADTS streams; ID3 tags are sometimes prepended but poorly supported, so wrapping in .m4a is the reliable way to tag AAC | rIFF INFO chunks hold basic tags, while the Broadcast Wave bext chunk and iXML add description, originator, and timecode for production workflows; some tools also embed ID3 chunks |
Pick WAV as the output
Select .wav in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if WAV is selectable, the route is real and validated.
Convert on your device
Press Convert. The transcode runs on an FFmpeg engine compiled to WebAssembly, so the audio never leaves your device.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid WAV file. Outputs keep the original filename with the .wav extension.
AAC to WAV questions, answered
Will converting AAC to WAV lose quality?
No new loss is introduced — since aac is lossy-oriented and wav is lossless-oriented, everything the .aac file still contains is carried over exactly. What was already discarded by the original lossy encode cannot be recovered, though; converting to .wav does not "restore" quality.
Is it private to convert AAC files here?
Yes — the .aac file is processed inside your browser tab and never uploaded. The transcode runs on an FFmpeg engine compiled to WebAssembly, so the audio never leaves your device. Close the tab and the file is gone from memory.
Where will the WAV file work?
Windows, macOS, Linux, iOS, Android, and all major browsers play .wav natively. Recordings that exceed 4 GB require the RF64 variant, which some consumer software fails to recognize.
Will the WAV file be bigger or smaller than my AAC?
Larger, sometimes much larger. A lossless .wav must store every pixel or sample the decoder produced, without the perceptual shortcuts .aac used. Use this route for editing headroom, not for saving space.
What happens to the metadata in my AAC file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, no standard tag container exists for raw ADTS streams; ID3 tags are sometimes prepended but poorly supported, so wrapping in .m4a is the reliable way to tag AAC; none of it is transmitted anywhere because the file never leaves your browser.
Can I convert WAV back to AAC?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .aac → .wav → .aac is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.