Explore our collection of 150+ developer tools, PDF editors, and image converters. Everything runs locally in your browser.
Ubify Core Engineering Team
SOFTWARE ENGINEERS & SYSTEMS ARCHITECTS
About This Tool
The MP4 to MP3 Converter strips audio soundtracks from MP4 video recordings, recorded lectures, and video podcasts without requiring desktop video editing software. Drag and drop any MP4 or compatible video file into the tool. Select your target audio bitrate preference: 128 kbps (lightweight voice), 192 kbps (standard music), 256 kbps (high quality), or 320 kbps (maximum fidelity).
Click Extract Audio to initiate in-browser decoding. The client engine reads the video file data, extracts the audio track stream, and renders a standalone audio file while calculating comparative file size metrics. You can audition the audio output immediately in the built-in media player and download it directly to your machine. All video processing and audio extraction execute 100% on-device within your browser session, keeping private video footage completely secure.
How to Use
- 1
Upload an MP4 video file or load the sample video clip.
- 2
Select your target audio bitrate (128 kbps, 192 kbps, 256 kbps, or 320 kbps).
- 3
Click the Extract Audio button and monitor progress as the audio track is extracted.
- 4
Review original vs extracted file size metrics and click Download MP3.
Frequently Asked Questions
Does this tool upload my video file to an external server?
No. The converter uses client-side browser media decoding to extract audio tracks entirely within your local device memory. Large video files never leave your computer.
Which bitrate should I select for podcasts or voice memos?
128 kbps or 192 kbps provides clear voice clarity while keeping resulting audio file sizes compact. For music concerts or soundtrack extraction, 256 kbps or 320 kbps is recommended.
Can I extract audio from videos without an internet connection once loaded?
Yes. Because all processing executes client-side in the browser engine, extraction works completely offline once the page has loaded.