AAC to WAV Converter

Convert AAC to WAV Online

Decode a lossy AAC file into an uncompressed WAV (LPCM) that editors, samplers, and broadcast tools accept without a transcode step. One important caveat first: converting to WAV does not restore detail that AAC already discarded — it produces a clean, editable copy at a much larger size, not a higher-quality master. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.

How to Convert AAC to WAV

1. Upload Your AAC File: Drag and drop your .aac file onto the page or click "+ Add Files" to browse. You can queue several files and convert them with the same settings.
2. Choose the PCM Bit Depth: Open Advanced Options and set the Audio Codec to the PCM format you need — PCM 16-bit Little Endian is the CD-quality default, 24-bit gives editing headroom, and 32-bit float suits a DAW round-trip.
3. Set Sample Rate and Channels (Optional): Leave Audio Sample Rate and Audio Channel on their original values to match the source, or pick 44.1 kHz / stereo for a standard deliverable. Use Trim to clip a start time and duration if you only need a section.
4. Convert and Download: Click "Convert" and save your WAV. No sign-up, no watermark.

AAC vs WAV: What Actually Changes

Frequently Asked Questions

Does converting AAC to WAV improve the audio quality?

No. AAC is a lossy format, so the encoder permanently removed audio data when the file was first created. Decoding to WAV reconstructs an uncompressed waveform from what remains — it cannot recover frequencies or detail that were already thrown away. The benefit is a lossless, edit-friendly working copy, not a higher-fidelity version of the original.

Why is my WAV file so much larger than the AAC?

WAV stores raw PCM samples with no compression. A 16-bit, 44.1 kHz stereo stream runs at 1,411 kbps — roughly 10 MB per minute — while a 128 kbps AAC is about 1 MB per minute. A tenfold size jump is normal and expected; it is the cost of carrying every sample uncompressed. In our testing, a 3-minute 128 kbps AAC track decoded to a 16-bit/44.1 kHz WAV of about 30 MB.

Which PCM bit depth and sample rate should I pick?

For a faithful copy, leave the sample rate on its original value so nothing is resampled, and choose 16-bit if you just need a standard WAV. Pick 24-bit or 32-bit float only if the file is headed into a DAW for further processing where extra headroom helps; upsampling a 128 kbps AAC to 24-bit will not add real detail, just larger files.

Is there a size limit I should know about for WAV?

The WAV (RIFF) container records its size in a 32-bit field, so a single standard WAV file caps out at 4 GiB — about 6.7 hours of 16-bit/44.1 kHz stereo. That ceiling is rarely a concern for typical clips. The practical limit on our end is upload size and time rather than the format itself.

Can I turn the WAV back into a small file afterwards?

Yes. Once you have edited the WAV, re-encode it to a compact lossy file with WAV to AAC, or use AAC to MP3 if you prefer MP3 for broad device support. Re-compressing a WAV that came from AAC is fine for delivery, but each lossy pass discards more data, so keep the WAV as your editing master.