Tools / File Converter / MP4 to AAC Converter

MP4 to AAC Converter

Convert MP4 files to AAC. Free, without uploading.

This tool converts MP4 files to AAC. MP4 is the most widely used video format. It usually holds H.264 video and AAC audio and plays on phones, browsers, TVs and social networks.

AAC is the lossy codec designed to succeed MP3; it sounds better than MP3 at the same bitrate. Only the audio of the MP4 video is kept and saved as AAC; the picture is dropped. AAC is lossy; you choose the quality from 96 to 320 kbps. 192–256 kbps is enough for music, 128 kbps for speech.

Conversion runs on your device; your file is never sent to a server. The components download once on first use, and later conversions start right away.

How to use

1. Choose the MP4 video, drag it in, or paste its link.
2. Choose the audio quality; optionally enter a start and end time.
3. Press "Convert" and download the AAC file.

Frequently asked questions

Will audio quality drop when converting to AAC?

AAC is lossy, so there is a small loss you won’t hear at higher bitrates. If the source is already lossy, a higher bitrate won’t improve it.

Is there a file size limit?

No fixed limit; your device’s memory decides. Computers usually handle files up to 1–2 GB.

Is my file uploaded?

No. Your MP4 file is converted to AAC inside your browser.