M4A to WAV
Free online lossless M4A to WAV conversion. Supports M4A, AAC, MP4, and MOV input. Fully browser-based — files never leave your device, complete privacy guaranteed.
Privacy Protection
All conversion runs locally in the browser — M4A files are never uploaded to any server, keeping your recordings private
High-Speed Conversion
Powered by WebCodecs with browser hardware acceleration — convert M4A to WAV fast, no upload needed
Lossless Output
WAV uncompressed format, compatible with all professional audio editing software, ideal for post-production workflows
Drag and drop an audio file here
or
Supports M4A, MP4, MOV formats
Convert M4A to WAV in Three Steps
Upload M4A File
Click the upload area or drag and drop M4A, AAC, MP4, or MOV files — up to 2 GB supported
One-Click Convert
WAV is a lossless format — no settings needed, just click Convert
Convert and download
Click Convert, then download the WAV file. Everything runs in the browser — no registration required
Common Use Cases for M4A to WAV Conversion
Professional Processing of iPhone Recordings
iPhone Voice Memos are saved as M4A by default. Convert recordings to WAV and import into Audacity, Adobe Audition, or other professional software for noise reduction, editing, and mixing. WAV offers the best compatibility with professional tools and eliminates import failures caused by format issues.
Voiceover and Dubbing Assets for Video
Premiere Pro, DaVinci Resolve, Final Cut Pro, and other video editors handle WAV voiceover and dubbing assets best. Converting M4A to WAV before import avoids audio re-compression during rendering and ensures the highest audio quality in your final video.
Professional Recording Archive
Convert interview recordings, meeting notes, and voice memos from M4A to WAV for long-term archiving. WAV is an archival-grade format independent of specific codecs — any software will still be able to open it decades from now.
Sound Effects for Games and Applications
In Unity, Unreal Engine, and iOS/Android development, WAV is the standard format for sound effects. Convert recorded sounds from M4A to WAV and import them into your development tools for the lowest playback latency — especially important for game audio that requires precise timing.
M4A vs. WAV: Key Differences
| Comparison | M4A (Lossy AAC) | WAV (lossless) |
|---|---|---|
| Audio quality | Lossy compression — indistinguishable at high bitrates for most listeners | Uncompressed — full audio data retained (limited by source M4A quality) |
| File Size | Small, approx. 1-2 MB/min (128-256 kbps) | Large — about 10 MB/min (44.1 kHz stereo) |
| Editing Compatibility | Some professional software requires extra decoding steps on import | All professional audio/video software supports WAV natively, no extra decoding needed |
| Re-processing | Re-compressing adds cumulative quality loss, not suitable as an editing source | Can be edited repeatedly without additional loss, ideal for editing and mixing workflows |
| Use Cases | Everyday listening, iPhone recording storage, sharing online | Professional production, video dubbing, game audio, long-term archiving |
Supported input formats
- M4A — the most common audio format on Apple devices, iPhone's default recording format
- AAC — the native codec of M4A, can also be uploaded directly
- MP4 — video file with an audio track; audio is extracted automatically
- MOV — Apple QuickTime format, commonly used for iPhone video recordings
Technical Notes
VideoKit's M4A to WAV converter uses the WebCodecs API to decode audio streams from M4A/AAC/MP4/MOV files directly in the browser, then packages them into a standard WAV file in uncompressed PCM format. The entire process runs locally — no audio data is ever sent to any server.
The output WAV uses standard PCM encoding, fully compatible with all major audio applications on Windows, macOS, and Linux. Sample rate and channel count match the source file, ensuring complete fidelity.
Frequently Asked Questions
How do I convert M4A to WAV?
Upload the M4A file, click "Convert to WAV", then download the result. No software to install, no files uploaded to any server.
Does converting M4A to WAV improve audio quality?
No. Audio information discarded by compression cannot be recovered; converting to WAV only changes the container, and the actual quality stays the same as the original M4A.
Which audio formats are supported as input?
All four input formats — M4A, AAC, MP4, and MOV — are supported and can each be converted to WAV in one click.
Will my files be uploaded to a server?
No. All processing happens locally in your browser. Audio files never leave your device — your privacy is fully protected.
Will the WAV file be much larger after conversion?
Yes, WAV is typically 5-10x larger than M4A, which is completely normal. WAV's advantages are editing compatibility and no cumulative re-compression loss.
Why would I convert an iPhone recording to WAV?
Converting an iPhone recording to WAV lets you import it into professional software for noise reduction and editing, or use it as voiceover material in video editors with maximum compatibility.
Which software supports WAV format?
Audacity, Adobe Audition, Logic Pro, Pro Tools, Premiere Pro, DaVinci Resolve, Unity, Unreal Engine, and more all support WAV natively.
What sample rate does the converted WAV have?
The output WAV sample rate matches the source M4A — typically 44100 Hz or 48000 Hz — and is not reduced.