Convert MP4 to AAC
Free online MP4 to AAC converter.
Choose .mp4 files
or drag and drop — multiple files supported
Max 200 MB for video · 100 MB for other files
Why convert MP4 to AAC?
Converting MP4 to AAC allows you to use your files in applications and platforms that require the AAC format. The conversion is fast, free, and preserves the quality of your original file.
Common use cases
- Using MP4 files in applications that require AAC
- Sharing files with people who need AAC format
- Preparing files for platforms that accept AAC
How to convert MP4 to AAC
- Click "Choose a .mp4 file" or drag and drop your MP4 file into the upload area.
- Select your preferred quality level — high quality keeps the best fidelity, smaller file prioritizes file size.
- Your file uploads directly to our secure servers and conversion starts automatically.
- Once finished, click "Download" to save your converted AAC file.
Tips for MP4 to AAC conversion
- High quality preserves the most detail from your original MP4 file.
- The converted AAC file can be used on any device or platform that supports the format.
- Files are automatically deleted from our servers within 24 hours for your privacy.
About MP4 and AAC formats
.MP4 format
MP4 (MPEG-4 Part 14) is the most widely used video container format. It stores video, audio, subtitles, and metadata in a single file. Compatible with virtually all devices, browsers, and media players.
.AAC format
AAC (Advanced Audio Coding) is the successor to MP3 with better sound quality at similar bit rates. Used by Apple Music, YouTube, and most streaming platforms.
Frequently asked questions
Is MP4 to AAC conversion free?
Yes, ConvertThis offers free MP4 to AAC conversion with no signup required. There are no watermarks, no daily limits, and no hidden fees.
How long does MP4 to AAC conversion take?
Most conversions complete in 2-15 seconds depending on file size. Larger files (over 50 MB) may take up to a minute.
Is my file safe during conversion?
Yes. Files are encrypted during upload using 256-bit SSL, processed on isolated servers, and automatically deleted within 24 hours. We never access, share, or store your files.
Convert MP4 to other formats
Convert other formats to AAC
Privacy and security
Your files are encrypted during upload using 256-bit SSL and are automatically deleted from our servers within 24 hours. We never share, sell, or access your files. All conversions happen on isolated, ephemeral servers.