How to convert MP4 to M4A
- Drop your MP4 music videos, podcast recordings, or stream archives into the queue.
- Keep original settings for blazing-fast lossless stream copying, or tweak bitrate options.
- Choose a custom AAC bitrate up to 320 kbps if you want to re-encode the audio track.
- Download your exported M4A tracks one by one or grouped together in a ZIP file.
Instant lossless audio ripping from video files
Creators and music fans constantly need to save soundtracks from live studio sessions, DJ performance videos, or interviews. When an MP4 file already contains AAC audio, this converter bypasses re-encoding completely, demuxing the audio stream and repacking it into an M4A file in seconds.
This stream-copy process is mathematically lossless, preserving identical bitrates, dynamic range, and frequency response without introducing generational compression loss. You get the exact acoustic master recorded into your camera or capture software without waiting for CPU re-encoding.
Optimizing audiobooks, voice memos, and mobile listening
M4A files integrate flawlessly into iPhone media libraries, Apple Music, and podcast players. Turning long video lectures, discussions, or commentary into standalone M4A files allows background mobile playback with the screen turned off, saving battery and pocket storage.
If you need to compress file sizes for spoken-word recordings, selecting Mono under More settings and choosing 96 or 128 kbps compacts long speech recordings dramatically. For musical recordings, leaving the default 192 kbps or bumping to 256 kbps preserves pristine high-end shimmer.
Private on-device media processing
All demuxing and encoding runs inside your browser using a 31 MB WebAssembly build of ffmpeg running on a single CPU core. Unreleased musical demos, proprietary video podcasts, and personal recordings never touch third-party servers, keeping your creative assets under your control.
Exported files are ready for immediate playback, and you can push them into the audio joiner or volume booster via Continue with to build out a complete browser-based audio production workflow.
Questions
Why is converting MP4 to M4A so fast?
Most MP4 videos already encode audio in AAC; the tool simply extracts that audio stream and places it in an M4A container without re-encoding.
Can I convert video files recorded on iPhone to M4A?
Yes. QuickTime MOV and MP4 files from iPhones extract cleanly to M4A, allowing you to save spoken interviews or musical performances as audio.
Will M4A files play on Windows PCs and Android devices?
Yes. Modern media players including VLC, Windows Media Player, and Android music apps support M4A audio playback natively.
What is the difference between MP4 audio and M4A?
MP4 is a multimedia container designed for video and audio, whereas M4A is specifically an audio-only container using the same MPEG-4 file structure.