MP4 to AAC Converter
Convert MP4 to AAC free online. Get clean, high-quality AAC audio for podcasts, YouTube, Spotify, streaming, and modern phones — fast, simple, no signup, no software.
Convert to AAC
Drop MP4 here or click to browse
MP4 videos, up to 500MB total
High Quality · Raw AAC audio stream
Need the transcript too?
Drop your AAC audio into ScriberGPT for clean text with timestamps and speaker labels.
How to convert MP4 to AAC
1. Upload your MP4
Drag and drop your MP4 video, or click to pick a file from your device. You can queue multiple videos for batch conversion.
2. Choose the quality
Pick the AAC bitrate that fits your use case — from 64 kbps for voice up to 320 kbps for music, broadcast, and high-detail content.
3. Convert and download
Click convert, wait a few seconds, then download your AAC file — ready for streaming, broadcast, embedded players, and modern devices.
Why use this MP4 to AAC converter
Better than MP3
AAC sounds cleaner than MP3 at the same file size. It's the audio format YouTube, Spotify, and most podcast hosts use.
Convert many at once
Drop in a whole batch of MP4s and convert them all to AAC at the same quality. Great for podcast catalogs and content libraries.
Files stay private
Everything happens in your browser. Your video is never uploaded to a server, so your files stay yours.
MP4 to AAC: A Simple Guide
Convert MP4 to AAC free online and get clean, modern audio you can upload to YouTube, Spotify, podcast hosts, streaming services, and web players. No signup, no upload, no software to install.
What is AAC?
AAC is the audio format behind YouTube, Spotify, Apple Music, and most podcast platforms. It sounds cleaner than MP3 at the same file size, which is why almost every modern streaming service uses it.
Which quality preset should I pick?
You get four quality presets. 64 kbps for voice and small files. 128 kbps for clean speech and everyday use. 256 kbps for podcasts and music with more detail. 320 kbps for the highest quality. Higher quality means a bigger file.
How batch conversion works
Drop in a stack of MP4s and convert them all to AAC in one go. Useful for podcast back catalogs, turning a YouTube archive into a podcast feed, or prepping a series of videos for streaming.
Which MP4 files work?
The tool handles standard MP4s from phones, cameras, screen recorders, Zoom, Google Meet, editing apps, and slide tools. Locked or DRM-protected videos won't work.
Why files stay on your device
Everything runs in your browser. We never upload your video to a server, so private interviews and client work stay yours.
How AAC compares to MP3
AAC sounds cleaner than MP3 at the same file size. A 128 kbps AAC file usually sounds as good as a 192 kbps MP3. If you can choose, AAC is the better pick.
What to check before downloading
After conversion you'll see the file name, quality, and size. If it's bigger or smaller than you wanted, just change the quality and convert again.
Where AAC plays
AAC plays in Chrome, Firefox, Safari, Edge, iPhone, Android, smart speakers, podcast apps, and streaming services. So you can upload your file anywhere people listen.
Frequently Asked Questions
How do I convert MP4 to AAC?
Upload your MP4, pick a quality, then click Convert to AAC. Download your file when it's ready.
Is AAC better than MP3?
Yes. AAC sounds cleaner than MP3 at the same file size. It's the audio format YouTube, Spotify, and most podcast platforms use.
What's the difference between AAC and M4A?
They use the same audio quality. AAC files end in .aac, M4A files end in .m4a. Use AAC for streaming, podcast hosts, and YouTube. Use M4A for iTunes and Apple Music.
Can I upload AAC to podcast hosts?
Yes. AAC is the standard audio format for podcast hosts, streaming services, and broadcast. Your file is ready to upload anywhere.
Is there a file size limit?
Free conversions are capped at 50MB total per request. For bigger videos, compress or split the file first.
Do you upload my video?
No. Everything happens in your browser. Your video never leaves your device.