Convert VIDEO to MP3, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your VIDEO file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert VIDEO to MP3
Video files carry both a video track and one or more audio tracks in the same container. MP4, MKV, WebM, MOV, AVI, and FLV files all store audio alongside their video. Extracting the audio as MP3 gives you a standalone audio file that works on any device, removes the video data to shrink the file substantially, and lets you listen to conference recordings, interviews, music videos, or lectures without a screen.
This converter extracts the audio track from any video file and encodes it as MP3 entirely in your browser using WebAssembly. The video is never uploaded to a server, making it appropriate for confidential meetings, personal recordings, or large files where an upload would be slow or impractical. A 2 GB video file can be processed locally without any file size restrictions.
Upload the video file
Drop any video file onto the converter: MP4, MKV, MOV, AVI, WebM, and FLV are all accepted. Very large video files are fine because no upload occurs.
Choose the MP3 bitrate
128 kbps handles speech and general audio well. 192 or 320 kbps is better for music videos or high-quality audio recordings where the original had good fidelity.
Extract and convert
The WebAssembly engine reads the video container, locates the primary audio track, demuxes it from the video, and re-encodes it as MP3. This may take a few minutes for long or high-resolution video files.
Download the MP3
Save the resulting audio file. The MP3 duration will match the video's duration. Verify the audio plays correctly and that all chapters or sections you need are included.
Frequently asked questions
Will the audio quality match the original video's audio?
The output quality is limited by the source audio. If the video's audio track was encoded at 128 kbps AAC, encoding the MP3 at 320 kbps will not add quality beyond what the source contained. Choose an MP3 bitrate close to the source audio bitrate.
Can I extract audio from a 4K or large video file?
Yes. The converter only reads the audio track data, not the video frames. File size is largely irrelevant to audio extraction time. A 10 GB 4K video may have the same audio data as a 300 MB 720p version.
Is the video uploaded to a server?
No. The entire process runs in your browser using WebAssembly. Your video file never leaves your device.
What if the video has multiple audio tracks (different languages)?
Most converters extract the first (default) audio track. If you need a specific language track from a multi-audio video, you may need to use a tool like FFmpeg that lets you specify the track by stream index.
Can I batch convert multiple videos at once?
This converter handles one file at a time. For batch audio extraction from multiple videos, FFmpeg is the standard tool: for f in *.mp4; do ffmpeg -i "$f" -q:a 0 -map a "${f%.mp4}.mp3"; done