Convert MP4 to AAC — Free & Private
No software needed. Convert MP4 to AAC right here, right now. Your files never leave your device.
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About MP4 to AAC Conversion
Extract the audio track from your videos for offline listening. Perfect for creating podcasts, saving music from concerts, or converting video lectures into portable audio files you can enjoy anywhere.
How to Convert MP4 to AAC
Converting files has never been easier or more secure. MixConvert uses advanced browser-based technology to process your files instantly without uploading them to a remote server. Follow these simple steps to get started:
- Select Your Files: Select your MP4 files by clicking the upload zone or dragging them directly onto the page.
- Choose Output Format: Confirm AAC is set as the destination format in the format selector.
- Convert Instantly: Click the convert button to begin. Your MP4 files will be processed locally in seconds.
- Download: Save your new AAC files directly to your device. Batch download available for multiple files.
MP4 to AAC FAQ
Can I convert MP4 to AAC on mobile devices?
Absolutely! Our converter is fully responsive and works on any smartphone or tablet. Just visit this page, upload your MP4 files, and convert them to AAC format—no app required.
Is my data secure when converting MP4 files?
100% secure. Unlike cloud converters, MixConvert processes your MP4 files entirely on your device using WebAssembly. Your data stays on your computer—we never see it.
How large can my MP4 files be?
We don't impose file size restrictions. Your browser handles the conversion, so the limit depends on your device's memory. Typical computers can process very large MP4 files without issues.
What's the conversion speed for MP4 files?
Conversion is nearly instant for typical MP4 files. Your device's processor handles the work, so faster devices complete AAC conversion more quickly.
Does MixConvert support converting multiple MP4 files at once?
Batch conversion is fully supported. Upload as many MP4 files as you need and convert them all to AAC in one go. A ZIP download option makes it easy to save everything.
Will the extracted audio match the original video's sound quality?
Yes, we extract audio at the highest quality your source MP4 contains. The AAC output maintains fidelity to the original soundtrack.
Understanding the Formats
MP4
MPEG-4 Part 14
The universal video format supported by virtually all devices and platforms. The go-to choice for video distribution.
AAC
Advanced Audio Coding
Modern audio codec offering superior quality to MP3, used by YouTube, Apple, and most streaming services.
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