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Convert.mp3

Convert MP3 to AAC online

100% localFiles never leave your device — no upload, no account, no tracking.
About MP3 to AAC

Convert MP3 files into AAC, the efficient codec used across Apple devices and streaming that often sounds better than MP3 at the same bitrate. Choose a bitrate and we encode AAC locally.

The conversion runs entirely in your browser via WebAssembly. Your MP3 never leaves your device and nothing is uploaded.

How it works
  1. 01

    Add an MP3

    Drop your MP3 file onto the page or pick it from your device.

  2. 02

    Set bitrate

    Choose the AAC bitrate for the output.

  3. 03

    Convert

    Click Convert to encode AAC locally.

  4. 04

    Download

    Save the AAC file.

Features
efficient codecadjustable bitratebroad compatibility
Frequently asked
How does the MP3 to AAC converter work?
Convert MP3 files into AAC, the efficient codec used across Apple devices and streaming that often sounds better than MP3 at the same bitrate. Choose a bitrate and we encode AAC locally.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The converter is free, needs no sign-up, and runs locally in your browser.
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