AAC to WAV Converter

Convert AAC to WAV Online

Decode a lossy AAC file into uncompressed WAV (linear PCM) that DAWs, samplers, transcription tools, and broadcast systems accept without a second transcode. One caveat up front: converting to WAV does not restore detail AAC already discarded — you get a clean, edit-safe copy at roughly ten times the size, not a higher-fidelity 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. Several files can be queued and converted with the same settings in one pass.
2. Pick the PCM Bit Depth: Expand Show All Options and set Audio Codec to the PCM variant you need — PCM 16-bit Little Endian for a standard CD-spec WAV, PCM 24-bit Little Endian for extra headroom before processing, PCM 32-bit Little Endian for maximum integer precision.
3. Set Channels, Sample Rate, and Trim (Optional): Under Advanced Options, leave Audio Channel and Audio Sample Rate on ORIGINAL for a 1:1 decode, or force Stereo/Mono and a fixed rate for a house-standard deliverable. Use Trim to keep only a start time and duration.
4. Convert and Download: Click "Convert" and save the WAV. No sign-up, no watermark.

AAC vs WAV: What Actually Changes

Which PCM Variant Should You Pick?

The Audio Codec list on this page is all PCM — the choice sets bit depth and sample coding, not "quality" in the compressed sense. Since the source is already lossy, a deeper bit depth adds file size and processing headroom, never recovered detail.

Frequently Asked Questions

Does converting AAC to WAV improve the audio quality?

No. AAC is lossy, so the encoder permanently threw away audio data when the file was first created. Decoding to WAV reconstructs an uncompressed waveform from what survived — it cannot rebuild frequencies or transient detail that were already discarded. What you gain is a lossless working copy: every edit, render, and effects pass from here on adds no further generation loss, which is exactly why editors ask for WAV.

Why is the WAV roughly ten times bigger than the AAC?

WAV stores every sample raw. Sixteen-bit stereo at 44.1 kHz is 44,100 × 16 × 2 = 1,411,200 bits per second, or about 10.6 MB per minute, while a 128 kbps AAC is about 1 MB per minute. The tenfold jump is arithmetic, not a setting you can tune — the only levers that change WAV size are bit depth, sample rate, and channel count.

Which bit depth should I choose — 16, 24, or 32-bit?

Sixteen-bit is the safe default and the one every editor, phone, and hardware sampler reads. Choose 24-bit if the file is heading into a DAW where you will apply gain, EQ, and compression — the extra headroom keeps rounding errors below audibility across a long chain. Note that the 32-bit option here is PCM 32-bit integer (little-endian), not 32-bit float; pick it only if a specific tool in your pipeline asks for it.

What are the PCM A-law and mu-law options for?

They are 8-bit companded formats from the G.711 telephony family — mu-law is the North American and Japanese convention, A-law the European one. They halve the file size against 16-bit PCM at the cost of obvious quality loss, and exist here for interactive voice response systems, older PBX gear, and legacy game engines that only ingest 8-bit WAV. For music, skip them.

Will my title, artist, and album tags survive the conversion?

Do not count on it. AAC files carry metadata in ID3 or MP4 atoms, while WAV has no single blessed tagging scheme — there is a RIFF LIST/INFO chunk and an unofficial ID3 chunk, and support for both varies wildly between players and editors. Treat the WAV as an audio working file and keep the original AAC (or a note in the filename) if the tags matter to you.

Does a multichannel AAC file stay multichannel in the WAV?

Yes, when you leave Audio Channel on ORIGINAL. AAC can carry up to 48 full-bandwidth channels plus 16 LFE channels, and WAV handles multichannel layouts through its extensible header, so a 5.1 AAC decodes to a 6-channel WAV. Set Audio Channel to Stereo to fold the mix down to two channels for software that cannot open surround files, or Mono for a single channel.

Is there a length or size limit on the WAV I get back?

The RIFF container records its size in a 32-bit unsigned field, so one standard WAV file stops just short of 4 GiB — roughly 6.8 hours of 16-bit/44.1 kHz stereo. That ceiling drops fast with more channels or a higher bit depth: a 24-bit 5.1 WAV hits it in well under an hour. In practice, upload size and time are the limit you will meet first, not the format.

How do I get back to a small file after editing the WAV?

Re-encode when you are done. WAV to AAC returns you to the same family at a delivery bitrate, and WAV to MP3 is the safest choice for old hardware. Remember that a WAV decoded from AAC and re-encoded to AAC has been through two lossy generations, so encode from the highest-quality source you still have, and keep the WAV as your editing master rather than your distribution file.