Convert MP4 to AAC Online Free
Convert MP4 to AAC instantly in your browser. No uploads needed - your files stay private on your device.
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images, videos, audio, documents - all processed locally
Why extract audio from MP4?
- ✓Create audio-only versions for podcasts or music libraries
- ✓Reduce file size when video content isn't needed
- ✓Extract soundtracks, voiceovers, or background music
- ✓Prepare audio for editing in dedicated audio software
How to convert MP4 to AAC
Upload your file
Drag and drop your MP4 file onto the converter, or click to browse your files.
Select AAC as output
Choose AAC from the format dropdown. The converter will automatically detect your file type.
Convert instantly
Your file is processed entirely in your browser using WebAssembly. No upload needed.
Download your file
Click the download button to save your converted AAC file.
About MP4 format
MP4 is the most widely used video container format, supporting H.264/H.265 video codecs and AAC audio. It offers excellent compression while maintaining high quality, making it the standard for streaming, downloads, and video sharing. Nearly every device, platform, and media player supports MP4 playback.
Pros
- +Universal device and platform support
- +Excellent compression with H.264/H.265
- +Supports subtitles and multiple audio tracks
Cons
- -Lossy compression affects quality
- -Editing can be complex without re-encoding
- -Some advanced codecs may not play everywhere
About AAC format
AAC is a modern audio codec that outperforms MP3 at the same bitrate, offering better sound quality in smaller files. Developed as MP3's successor, AAC is the default format for Apple Music, YouTube, and many streaming services. It's widely supported on mobile devices and modern platforms.
Pros
- +Better quality than MP3 at same bitrate
- +Standard for streaming services
- +Excellent mobile device support
Cons
- -Some older devices don't support it
- -Licensing can be complex
- -Less universal than MP3