.m4a.wav
How to Convert M4A to WAV
To convert M4A to WAV, upload your .m4a above, select WAV, and download uncompressed PCM audio ready for any editor or DAW. This is the standard prep step for editing iPhone voice memos and iTunes audio in professional tools. If the M4A contains ALAC (Apple Lossless), the conversion is bit-perfect; if it contains AAC, it preserves the decoded audio without new loss.
This page is part of the Audio Converter hub, which covers every audio format pair JoltFile supports.
In-browser audio limit: 200 MB per file
Browser-based processing — your files never leave your device
Need files over 200 MB, batch conversion, or keyboard shortcuts?
JoltFile desktop appHow to convert M4A to WAV in 5 steps
The whole process takes under two minutes and requires no software installation or account. Your original M4A file is never modified.
Upload your M4A file
Drag your .m4a file onto the converter above, or click “Browse files” to select it from your device. Files are processed locally in your browser whenever possible — nothing is uploaded to a server.
Confirm the output format is WAV
The converter defaults to M4A → WAV on this page. If you dropped in a different file type, set the target format to WAV (.wav) using the format menu.
Adjust quality settings
Pick a bitrate or quality setting. 256–320 kbps is effectively transparent for music; 128 kbps is fine for speech.
Convert the file
Click “Convert”. JoltFile processes the file and shows a progress indicator — most audio conversions finish in a few seconds.
Download your WAV file
Save the converted .wav file to your device. The original M4A file is never modified, and temporary data is discarded automatically.
What happens to quality when converting M4A to WAV?
ALAC-based M4A converts to WAV losslessly — identical samples. AAC-based M4A decodes to PCM exactly as it sounds, with no additional loss (though the AAC's original loss remains). Files grow substantially: expect roughly 10 MB per stereo minute at CD quality.
When should you convert M4A to WAV?
- Editing iPhone voice memos in Audacity or a DAW
- Preparing iTunes audio for sampling or production
- Feeding audio into tools that reject M4A
- Archiving recordings in an uncompressed working format
M4A vs WAV: format comparison
| Property | M4A | WAV |
|---|---|---|
| File extension | .m4a | .wav |
| Full name | MPEG-4 Audio | Waveform Audio File Format |
| Compression | Lossy (AAC) or lossless (ALAC) | Uncompressed (PCM) |
| MIME type | audio/mp4 | audio/wav |
| Introduced | 2001, by MPEG / Apple (popularized) | 1991, by Microsoft & IBM |
| Best for | Apple-ecosystem audio, voice memos, and iTunes libraries | Recording, editing, and mastering; convert to MP3/FLAC for distribution |
About the M4A and WAV formats
What is M4A? (MPEG-4 Audio)
M4A is the audio-only variant of the MP4 container, popularized by Apple's iTunes. It almost always contains AAC audio (lossy) or ALAC (Apple Lossless), and it is the native format of iPhone voice memos and Apple Music downloads.
Strengths
- AAC beats MP3 quality at the same bitrate
- Native across the Apple ecosystem
- Can hold lossless ALAC audio
- Good metadata and chapter support
Limitations
- Confusing — .m4a can be lossy AAC or lossless ALAC
- Older non-Apple hardware players may not support it
- Less universal than MP3
What is WAV? (Waveform Audio File Format)
WAV is the standard uncompressed audio format for Windows, storing raw PCM audio exactly as recorded. It is the working format of recording studios — a stereo CD-quality WAV runs about 10 MB per minute because nothing is discarded.
Strengths
- Bit-perfect, uncompressed audio
- Universal support in DAWs and editors
- No decoding overhead
- Supports very high sample rates and bit depths
Limitations
- Huge files — ~10 MB per stereo minute at CD quality
- Weak metadata/tagging support
- Impractical for streaming or email
M4A to WAV conversion: your questions answered
Is M4A to WAV a lossless conversion?
If the M4A holds ALAC (Apple Lossless), yes — bit-perfect. If it holds AAC, the WAV preserves the decoded audio exactly but can't recover what AAC already discarded. Either way, nothing new is lost.
Why convert voice memos to WAV before editing?
Uncompressed PCM scrubs, cuts, and processes cleanly in every editor, and exporting your edit from WAV avoids stacking a second generation of lossy compression on the final result.
How much bigger will the WAV be?
Roughly 5–10× larger than a typical AAC M4A. WAV stores raw PCM at about 10 MB per stereo minute (CD quality); voice memos in mono run about half that.
Is it free to convert M4A to WAV with JoltFile?
Yes. JoltFile's free tier covers everyday M4A to WAV conversions with no account and no watermarks. Higher file-size limits and batch processing are planned for the upcoming Pro tier.
Is my M4A file private when I convert it?
Yes. JoltFile is designed around browser-based processing: whenever technically possible your file is converted locally on your own device and never uploaded to a server. Files that do require server processing are encrypted in transit and deleted automatically after conversion.
FAQ provided by JoltFile.