Convert MP4 to AAC
Pull the soundtrack out of any MP4 video and save it as AAC in seconds. Conversion happens inside your browser, so even large or private videos are never uploaded.
Drop MP4 files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert MP4 to AAC
- Click "Choose files" or drag your MP4 videos onto the page.
- Make sure "AAC" is selected as the output format (192 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your AAC files.
Why convert MP4 to AAC?
AAC files are much smaller than video and play on any music player, phone or car stereo.
AAC is best for streaming, broadcast and devices that need a raw AAC stream. Most phones, browsers, smart TVs and media players.
Will I lose quality?
The audio is decoded from the MP4 video and encoded to AAC. Choose a lossless format (WAV/FLAC) for zero loss, or a high bitrate for AAC.
MP4 vs AAC
| MP4 | AAC | |
|---|---|---|
| Full name | MPEG-4 Video | Advanced Audio Coding (ADTS) |
| Type | video | lossy |
| Best for | videos from phones, YouTube and social media | streaming, broadcast and devices that need a raw AAC stream |
| Typical size | varies | ~1.4 MB at 192 kbps per minute |
| Compatibility | Universal video format. | Most phones, browsers, smart TVs and media players. |
| Developed by | - | MPEG (1997) |
MP4 to AAC: questions
How do I convert MP4 to AAC?
Open this page, add your MP4 file, make sure AAC is selected as the output format and click Convert. Your AAC file is ready to download in seconds.
Will converting MP4 to AAC lose quality?
The audio is decoded from the MP4 video and encoded to AAC. Choose a lossless format (WAV/FLAC) for zero loss, or a high bitrate for AAC.
Is this MP4 to AAC converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many MP4 files to AAC at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between MP4 and AAC?
MP4 (MPEG-4 Video) is a video format, the most common video format. We extract its soundtrack so you can save just the audio. AAC (Advanced Audio Coding (ADTS)) is a compressed (lossy) format: raw AAC audio stream. The successor to MP3 used by YouTube, iPhone and digital radio.
Does it work on Mac, Windows, iPhone and Android?
Yes. The MP4 to AAC converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.