WAV to M4A or WAV to MP3?

M4A (AAC) sounds a little better at the same size and suits Apple devices; MP3 plays on even more old hardware.

What bitrate should I use?

192 kbps for music, 128 kbps for speech, 256 kbps for the best quality offered.

Why doesn't it work in Firefox?

Firefox has no AAC encoder yet. Use Chrome, Edge or Safari.

WAV to M4A Converter

Convert WAV files to M4A in your browser — nothing is uploaded.

MP3, WAV, FLAC, M4A, M4B, MP4, AAC, OGA or WEBA, one or many. Drop them here or paste with ⌘V / Ctrl+V. Choose what each becomes on its row.

Runs on your device. Files are read and converted in your browser and aren't uploaded.

WAV

Lossless
Uncompressed
Made for editing

Sound stored exactly as it was recorded, with no compression. WAV files are big — about 10 MB a minute at CD quality — but every editor, DAW and computer opens them, so they're the standard for recording, editing and handing over masters.

WAV Converter — convert WAV files to any format

M4A

Lossy
Apple's format
Keeps chapters

AAC audio in an MP4 container — the format of iTunes and Apple Music purchases, iPhone voice memos and many recorders. It sounds a little better than an MP3 of the same size, and plays on Apple devices, Android, Windows and in browsers.

M4A Converter — convert M4A files to any format

Learn more about converting WAV to M4A

When you'd do this

You want a recording or a mix small enough to share, in the format Apple devices, iTunes and many podcast tools prefer — and better sounding than an MP3 of the same size.

What to expect

A 4-minute CD-quality WAV is about 40 MB; as an M4A at the default 192 kbps it's about 5.5 MB, at 256 kbps about 7.3 MB, at 128 kbps about 3.7 MB.

Recommended settings

192 kbps for most music; 256 kbps (the most offered here) for masters you'll listen to closely; 128 kbps for speech and podcasts.

Where it plays

iPhone, iPad, Mac, Apple Music and iTunes, Android, Windows and every modern browser.

Good to know

Firefox can't make M4A files yet: use Chrome, Edge or Safari.
Lossy: keep the WAV if you'll edit again.
An M4A made here can be up to 5 hours long — and gapless, so albums play without gaps between tracks.
Chrome's AAC encoder takes only 44.1 and 48 kHz; other rates are resampled.

How to do it

Choose your WAV files, or drop them on the page — as many as you like.
Each is set to M4A. Change one on its own row if you like, and the AAC bitrate and the channels in Settings.
Convert all, then download each M4A, or all of them in one .zip.

Questions

WAV to M4A or WAV to MP3?: M4A (AAC) sounds a little better at the same size and suits Apple devices; MP3 plays on even more old hardware.
What bitrate should I use?: 192 kbps for music, 128 kbps for speech, 256 kbps for the best quality offered.
Why doesn't it work in Firefox?: Firefox has no AAC encoder yet. Use Chrome, Edge or Safari.