Convert Apple M4A / AAC audio to WAV for editing and DAWs — fully in your browser, no upload.
Drop an M4A file here
or click to choose from your computer
M4A · AAC · audio from Apple devices
Your file will be converted to WAV (uncompressed audio). Click Convert when ready.
Converting…
M4A usually wraps AAC audio from iPhones, iTunes and many voice memos. WAV is an uncompressed PCM format that most DAWs, editors and quality-check tools open without fuss. Converting M4A to WAV gives you an editable, widely compatible copy of the same recording.
Sound Booster decodes the file in your browser and writes a 16-bit PCM WAV. The audio does not need to leave your device for the core conversion workflow.
Use this when an editor rejects M4A or a collaborator requests PCM WAV. For speech, keep the original M4A as well: converting to WAV improves compatibility for editing but does not undo the lossy AAC encoding, and the uncompressed copy takes more disk space.
Converting M4A to WAV on Sound Booster is a short, local process: you add the M4A file, decode it in the browser, and download an uncompressed WAV without installing desktop software. Keep this tab open until progress reaches 100% so encoding can finish.
The page is fixed to WAV output, so you do not need to pick a format from a long list. Most everyday M4A files, such as songs, voice memos and podcast episodes, convert quickly; the first run in a session may take a moment while the audio engine prepares.
Drop an M4A file on the panel, choose it from disk, or open it from Your Library. Stereo and mono M4A files are accepted when the browser can decode the audio inside them, which covers the usual AAC files from iPhones, iTunes and voice memos.
Click Convert to WAV. The compressed audio inside the M4A is decoded and written as 16-bit PCM WAV. Progress shows as a percentage while processing runs in your browser.
Save the WAV to your device, or store it in Your Library so you can open Volume Booster, Equalizer, Trimmer, or other tools without re-uploading the file.
M4A is an MPEG-4 audio container, not a codec on its own. Most M4A files hold lossy AAC, which is what iPhones, iTunes and many voice memo apps produce, but the same container can also hold Apple Lossless (ALAC), which is compressed without losing detail. Which one you have decides what conversion can preserve: an AAC-based M4A has already lost some detail that WAV cannot bring back, while an ALAC-based M4A converts to WAV without any quality loss.
WAV is a common uncompressed audio container, usually holding PCM samples. Editors and DAWs open it reliably, and round-trip processing does not add another lossy encode the way repeated AAC saves can. The trade-off is a much larger file than the same length in M4A.
Bring an M4A into Audacity, Reaper, Ableton, or Logic as WAV, especially when a program rejects M4A, so cuts, fades, and effects sit on a clean PCM timeline.
Many NLEs and podcast tools prefer WAV on the timeline. Convert once, then drop the file into the project.
Save WAV to Your Library and open Equalizer, Bass Booster, or Trimmer without re-uploading the source M4A.
Keep a WAV working copy so repeated saves do not stack lossy compression artifacts. Keep the original M4A too, since it is usually the smaller file.
No. Conversion expands the file to PCM, but detail already removed when the M4A was encoded cannot be recovered. This applies to lossy AAC files; an M4A that holds lossless ALAC audio converts to WAV without any loss. WAV is still better for editing and further processing. Use the WAV as a working asset when the next application expects uncompressed audio samples.
No. Decoding and WAV encoding are designed to run locally in the browser for this tool.
Yes on this page, without a mandatory account.
Uncompressed PCM needs more disk space than M4A, which is usually compressed with AAC. That is normal and expected for editor-friendly files.
Try Chrome or Edge, a shorter file, and keep the tab open until progress reaches 100%.
The output can retain the decoded channel layout when it is supported by the converter. For a typical stereo music file, expect two channels; if the source uses surround audio, confirm the output channel count before starting a larger editing project.
WAV is useful when an editor or production tool expects PCM audio, or when you plan to trim, process, or analyze the sound. It is an intermediate working format, not a way to recover detail that was absent from the compressed M4A source.
