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AAC to WAV Converter

Turn AAC files into WAV in a couple of clicks. AAC is the successor to MP3 — better quality per bit; WAV is uncompressed PCM audio. The conversion is lossless — every pixel, sample or byte in the source is preserved.

Not uploaded to any serverConverted on this deviceGone when you close the tabHow this works

Drop your files here

AAC files (.aac, .adts) · up to 300 MB each

or paste files from your clipboard

Ready when you are

Drop a AAC file above and FileTools360 will turn it into WAV — right here on your device, without uploading anything.

⌘K to search converters

How to use it

  1. 1

    Add your AAC files

    Drag them onto the drop area, choose them from your device, or paste them from your clipboard. You can queue several at once. Nothing is sent anywhere — the file stays on this device.

  2. 2

    Adjust the settings if you want to

    The defaults suit most people. Open Advanced to control bitrate, sample rate and channels.

  3. 3

    Convert and download

    Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

Privacy, in plain words

Is it safe? Your AAC file is not uploaded anywhere

What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.

What happens instead. This site does not do it. There is no server here that receives files, so your AAC file is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.

Check it yourself in ten seconds

Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.

The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.

Why this matters more than it sounds

An audio file is a conversation. Transcribed by machine — which is cheap now — it becomes searchable text about whoever was speaking. It matters more than it sounds, because of what audio files usually are:

Interviews

a source's voice is identifying even when the name is not said

Voice notes and dictation

thinking out loud, never meant for an audience

Therapy and consultation recordings

clinical material with strict handling rules

Meeting audio

internal discussion, named people, unannounced decisions

A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.

AAC and WAV explained

AAC is the successor to MP3 and is the default audio codec for MP4 video, Apple Music and YouTube. At the same bitrate it generally sounds noticeably better than MP3.

WAV stores uncompressed PCM audio — the raw samples, exactly as captured. A stereo CD-quality minute is roughly 10 MB, which is the price of having no compression whatsoever.

Where AAC files come from
Streaming services, video soundtracks and Apple devices.
Where WAV is used
Recording sessions, sample libraries and audio editing.

AAC vs WAV

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

AAC compared with WAV
PropertySourceTarget
CompressionLossyUncompressed
Introduced19971991
Browser supportExcellent across modern devices.Universal.
AAC is stronger at
Better quality per bit than MP3. The standard audio track for MP4 video. Excellent device support.
WAV is stronger at
Perfect fidelity with zero compression artefacts. No decoding overhead, so editors scrub instantly. Universally supported.

Why convert AAC to WAV?

People make this switch when they run into the limits of AAC: archiving, or targeting very old playback hardware. WAV is the better fit when recording, editing, mastering, or handing audio to another tool.

Be aware of the size trade-off: WAV is uncompressed, so expect the converted file to be considerably larger than the AAC you started with.

AAC limitations that prompt the switch
Still lossy. Patent licensing applies to encoders. Slightly less universal than MP3 on very old hardware.
What you give up
Very large files. No standard metadata support worth relying on.

Does converting AAC to WAV reduce quality?

Going from AAC to WAV moves already-compressed data into a format that stores it exactly. Nothing is lost from this point on, but nothing is recovered either — the detail AAC discarded when the file was first created is gone permanently. Expect a noticeably larger file for identical audio quality.

Measured, not estimated

What converting AAC to WAV actually costs

On every sample measured, the WAV came out larger — 5.6× larger at best and 5.8× larger at worst.

Each row is one sample chosen to isolate a property these formats treat differently.
SampleAAC inWAV outChange
An easy clipThe compressible end of the range — a clean tone, or a moving test pattern — where a codec does its best work.30.5 KB176 KB5.8×
A hard clipThe other end — pink noise, or dense video grain. Close to incompressible by design, and the worst case for every codec.31.4 KB176 KB5.6×

Produced by this site's own converter. The same code that runs in your browser, at the same default settings, so these are the bytes you would download.

Samples are generated from a fixed seed rather than taken from real photographs or documents, so the corpus is reproducible and carries no licensing question — and so the numbers predict the shape of your result rather than its exact size. Measured 2026-10-01. The method, and the command that regenerates every figure on this page, are on the how it works page.

About these formats

Source

Advanced Audio Coding

The successor to MP3 — better quality per bit.

Extensions
.aac, .adts
MIME type
audio/aac
Best for
Streaming · Apple devices · Video soundtracks
Compatibility
Excellent across modern devices.

Target

Waveform Audio

Uncompressed PCM audio. Perfect quality, big files.

Extensions
.wav, .wave
MIME type
audio/wav
Best for
Editing and mastering · Sound design · Archival
Compatibility
Universal.

The output is a lossless container, but the audio inside it was already compressed. You get a bigger file, not better sound.

Good to know

AAC to WAV Converter — questions

How do I convert AAC to WAV?

Drop your AAC file onto the area above, then press Convert. The WAV file saves straight to your device. You do not need an account, and there is no watermark.

Is it safe to convert AAC files here — are they uploaded to a server?

No, nothing is uploaded. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website; it is converted there and sent back. That copy is what "upload" means, and it is the part that puts your file out of your control. This site does not do it. Your AAC file is read and converted by the browser you are using right now and never leaves this device, so there is no copy for anyone to store, read or hand over. You can prove it: turn off your Wi-Fi after this page loads and the conversion still works.

Can I convert confidential AAC files, like bank statements or contracts?

Yes, and that is the case this site was built for. Because the file never leaves your device, a confidential document is no more exposed than it is sitting in your own folder — there is no transfer, no copy on someone else's hardware, no retention period to read about and no staff with access. Nothing is logged about the file either: not its name, not its size, not its contents. The one thing worth saying plainly is that this protects the file in transit and at rest on our side, not from anything already on your own computer.

What should I know before converting AAC to WAV?

The output is a lossless container, but the audio inside it was already compressed. You get a bigger file, not better sound.

Does converting to WAV reduce quality?

No. WAV is a lossless format, so the conversion preserves exactly what is in your AAC file. Note that it cannot recover detail that was already discarded when the AAC was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 300 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android. Pick the file from wherever your phone stores it — Files on iOS, or your downloads folder on Android. Long recordings may run out of memory on an older phone.

Related converters

All audio converters
WAV → AAC
AAC → AIFF
AAC → FLAC
AAC → M4A
AAC → MP3
AAC → OGG
AAC → Opus
MP4 → WAV

Runs entirely in your browser

FileTools360 by the numbers

527 converters and tools65 file formatsnothing ever uploaded.