M4A to WAV Converter – Free Online

How to Convert M4A to WAV Online

Upload your M4A file

Drag and drop your .m4a file onto the page or click to browse. You can select several M4A files at once to batch-convert them.

WAV is preselected

The output format is already set to WAV, so you can convert immediately. If you need to, adjust the audio codec, bitrate or sample rate in the settings panel first.

Convert and download

Click Convert. The WAV file is processed on your own device; nothing is uploaded to a server. When it finishes, click Download to save it (or Download all to get a batch as a ZIP).

Why Convert M4A to WAV?

iPhone Voice Memos, GarageBand exports and Zoom recordings often arrive as M4A, but audio editors, transcription services and phone systems prefer WAV. Converting M4A to WAV gives you a plain PCM file that opens instantly in Audacity, Pro Tools, Logic and Descript.

The converter decodes AAC or ALAC in your browser with no upload, which is useful when the recording is a confidential interview or meeting, and lets you set the sample rate.

Private by design: your M4A file is converted on your own device and never uploaded.
WAV preselected: the output format is already chosen, so it is a one-click conversion.
Batch friendly: convert several M4A files in one go and download them as a ZIP.
No limits, no watermark: free for files of any size, with nothing stamped on the output.

M4A vs WAV

M4A (MPEG-4 Audio): M4A is audio-only MP4, normally holding AAC (or lossless ALAC). It is the native format of iTunes, Apple Music and iPhone Voice Memos and sounds better than MP3 at the same bitrate. It is best for Apple devices, iTunes and voice memos.

WAV (Waveform Audio File Format): WAV stores uncompressed PCM audio exactly as it was recorded. It is the standard for audio editing, mastering and archiving, at the cost of large files (about 10 MB per minute of CD-quality stereo). It is best for editing, mastering, DAWs and archiving.

In short: keep M4A when the priority is Apple devices, iTunes and voice memos, and switch to WAV when the file is headed for editing, mastering, DAWs and archiving. Need a different target? The full Audio Converter supports every format listed below.

M4A to WAV FAQ

Does M4A to WAV improve quality?

No. The WAV holds exactly what the M4A contained; it avoids further loss during editing but cannot add detail.

What sample rate should I use for transcription?

16 kHz is what most speech-recognition engines use internally and keeps the WAV small; use 44.1 or 48 kHz for music or broadcast.

Is this M4A to WAV converter free?

Yes. Converting M4A to WAV on MediaConverter.io is completely free, with no watermark, no sign-up and no daily conversion limit.

Are my M4A files uploaded to a server?

No. The converter runs inside your browser using WebAssembly and WebCodecs, so your .m4a file is read and converted on your own device. Nothing is uploaded, which keeps private recordings private and means there is no waiting in an upload queue.

Is there a file size limit for M4A to WAV?

No fixed limit. Because processing happens locally, the practical limit is your computer's memory and patience; multi-gigabyte M4A files convert fine on a desktop browser. Very large files take longer on phones.

Which browsers support the M4A to WAV converter?

Current versions of Chrome, Edge, Firefox and Safari on desktop all work. Chrome and Edge are fastest because they expose hardware-accelerated WebCodecs decoders.