Extract the soundtrack from MP4 videos and save it as AAC. Free, with no upload — even large videos are processed on your device.
Drop audio or video files here
or paste them, or click to choose — several files at once
Choose filesMP3, WAV, FLAC, OGG, M4A, AAC, OPUS, AIFF, WMA, APE, AMR, MP4 and more · up to 300 MB per file
The converter (about 30 MB) is downloaded once on first use and then cached. Your files never leave your device.
Drop MP4 files onto the converter, paste them, or click to choose. You can add many at once.
AAC is already selected. If you like, adjust the quality, sample rate or channels before or after adding files.
Each file is converted in your browser in seconds. Save them one by one, or all at once as a ZIP.
MPEG-4 Part 14
Video with a soundtrack
MP4 is the most common video format, and its soundtrack is usually AAC. Converting it to an audio format keeps only the sound and drops the picture.
Advanced Audio Coding
Efficient successor to MP3
AAC (Advanced Audio Coding) was designed to replace MP3 and is used by YouTube, Apple and digital radio. An .aac file is a raw AAC stream without an MP4 container.
Audio is converted by ffmpeg running inside your browser. Your files never reach a server.
Queue up to 50 files and download them one by one or together as a ZIP.
Set the bitrate, bit depth, sample rate and channels — or simply keep the sensible defaults.
Add your MP4 files to the converter above. AAC is already selected as the output, so conversion starts right away. When a file is ready, click Download, or use Download all to get a ZIP.
The soundtrack of the MP4 video is decoded and saved as AAC. With the default settings it sounds the same as in the video; only the picture is left out.
192 kbps is transparent for most music and 128 kbps is plenty for speech. Choose M4A instead if you want cover art and tags to be kept.
No. The MP4 to AAC conversion runs entirely in your browser using ffmpeg compiled to WebAssembly. Your files are never sent to a server, so even private recordings stay on your device.
Yes. Add up to 50 files; they are converted one after another, and you can download each AAC file separately or all of them together as a ZIP archive.