Why convert M4A to WAV for audio editing?

DAWs and audio editors work best with uncompressed audio. WAV files don't have codec decode overhead and can be edited without re-compression artifacts. It's standard practice to work in WAV or AIFF during editing, then export to M4A/MP3 for distribution.

Does converting M4A to WAV improve quality?

The conversion decodes the M4A/AAC to PCM audio (the same data used internally during playback). You won't recover quality lost by the original AAC encoding, but you will have a lossless WAV that doesn't degrade further during editing.

Will the WAV file be much larger than the M4A?

Yes. A 10MB M4A typically becomes 80–120MB as WAV. This is expected — WAV stores uncompressed audio, which is much larger but better for editing workflows.

Are my audio files uploaded to a server?

No. FFmpeg.wasm processes everything in your browser.

Can I import M4A into Audacity directly?

Audacity can import M4A on newer versions with FFmpeg installed. If you get an import error, converting to WAV first is the most reliable workaround.

Does this work with iPhone voice memos?

Yes. Voice memo .m4a files exported from the iPhone Voice Memos app convert cleanly to WAV.

M4A to WAV Converter

Convert M4A to WAV free online — no upload, no signup. Get lossless WAV for audio editing in Audacity, Pro Tools & DAWs. Browser-based, 100% private.

FileConvertir — Free Online File Converter