Convert MP3 to M4A / AAC

Need the other direction? M4A / AAC → MP3

Converting MP3 audio to M4A / AAC

Morphr decodes your MP3 and re-encodes it as M4A / AAC, a compact format that plays just about everywhere. If the source was already lossy, going from one lossy format to another can’t bring back detail the first encoder removed.

MP3 and M4A / AAC, explained

MP3 is the universal lossy audio format, playable on every device. It shrinks sound to a fraction of its size at a quality that is hard to fault for everyday listening. M4A (AAC) is the lossy audio format used by Apple Music and iTunes, generally better than MP3 at the same bitrate.

Good to know

• • Your MP3 files never leave your device — everything converts locally in the browser, so even confidential ones stay private.
• • Convert as many MP3 files as you like at once; a batch comes back as a single ZIP.
• • No sign-up, no watermark and no size limit beyond your device’s memory.

The private way to turn MP3 into M4A / AAC

With Morphr, the whole conversion runs inside your browser tab using your browser's built-in decoder, so your file is never uploaded to a server, queued, or stored. That makes it a safe choice for personal photos, scanned documents and anything you'd rather not hand to a third party.

New to these formats? Read the guides on MP3 and M4A / AAC.

Frequently asked questions

How do I convert MP3 to M4A / AAC?

Drop your MP3 file onto the converter above (or click to browse), and Morphr converts it to M4A / AAC right in your browser. When it's done, click download — there's nothing to install and no account to create.

Will my formatting be preserved in M4A / AAC?

Your text and core formatting — headings, bold, lists and links — carry across. Things like multi-column layouts, text boxes and precise spacing may be flattened.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser, so your MP3 file never leaves your device.