MP4 to AAC
MP4 to AAC is a free online video converter for changing MP4 files into AAC files. MP4 to AAC accepts 1 MIME type, returns audio/aac, includes 0 settings, and runs in your browser on the device.
Drop .mp4 file here
or click to choose
Key facts
- Input
- 1 format: MP4 (video/mp4)
- Output
- AAC (audio/aac)
- Runtime
- your browser on the device
- Settings
- 0 controls; default conversion path
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use MP4 to AAC
- 1
Open your MP4 file
Drop your MP4 file onto the page, or click to browse and pick one from your device.
- 2
Choose options
No options to configure. MP4 to AAC uses sensible defaults.
- 3
Convert and download
Click Convert. Your AAC file is ready to download in seconds.
MP4 to AAC details
First, MP4 to AAC reads MP4 source files and prepares AAC output for the video workflow. Next, MP4 to AAC keeps the conversion path simple with no extra controls. Additionally, Files and text stay in the browser session.
Pull the audio track out of an MP4 and save it as a raw.aac file. The video stream is discarded and, on the happy path, the audio isn't re-encoded at all; ffmpeg's `-c copy` simply repackages the existing AAC stream from the MP4 container into a bare AAC file. That makes this nearly instant, even for long clips, and means there's zero generation loss: the bytes that go in are the bytes that come out. Almost every MP4 uses AAC audio, so this works for the vast majority of files. If a particular MP4 has an unusual audio codec (or a stream that can't be copied directly), the conversion will surface a clear error and you can use mp4-to-mp3 instead. The conversion runs entirely in your browser via ffmpeg.wasm; nothing is uploaded.
Common searches
- mp4 to aac
- convert mp4 to aac
- mp4 to aac converter
- change mp4 to aac
- mp4 aac converter
- extract audio from mp4
Related tools
Tools that work with the same formats — most users open one of these next.
Video Trimmer
Cut a clip from a video file — MP4, WEBM, MKV, MOV, AVI — in your browser.
MP4 to MP3
Extract the audio track from an MP4 video as an MP3 file — free online.
MP4 to WAV
Extract the audio track from an MP4 video as an uncompressed WAV file.
MP4 to FLAC
Extract the audio track from an MP4 video as a FLAC file — free online.
Compress Video
Shrink a video file by re-encoding to H.264 with a quality preset — free, in-browser.
MP4 to WebM
Convert MP4 video to WebM (VP9 + Opus) — free, runs entirely in your browser.
Frequently asked
What is MP4 to AAC?
MP4 to AAC is a free online video converter for changing MP4 files into AAC files. MP4 to AAC accepts 1 MIME type, returns audio/aac, includes 0 settings, and runs in your browser on the device.
What files does MP4 to AAC accept and create?
MP4 to AAC accepts MP4 files (video/mp4) and creates AAC files (audio/aac). There are no required settings before conversion.
Do my files and data stay private?
Yes. MP4 to AAC runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use MP4 to AAC?
Open MP4 to AAC, drop in your MP4 file, choose any options, and click Convert. Your browser does the work locally and produces a AAC file you can save right away.
What is the maximum file size for MP4 to AAC?
Because MP4 to AAC runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.