Convert MP4 to MP3
Select Files
Audio, Video and Image supported. Drag or click
Convert MP4 to MP3 free in your browser. Selected files are processed locally, without sending them to a conversion server. Browser memory and codec support can limit processing.
How It Works
Select the source
Choose one or more MP4 files from your device. Start with a small file when testing a new browser.
Confirm the destination
Confirm MP3 as the output. A quality slider is available only for image output in JPG, JPEG or WebP.
Download and check
Keep the tab open during processing, then save the completed MP3 file. Check it in the destination application.
About These Formats
Extract the first audio track from an MP4 as a new MP3 for listening to a lecture, interview or recording. The original file stays unchanged. The current converter uses a preset with variable bitrate; it does not offer bitrate selection, trimming, channel selection or a choice of audio track. It does not isolate vocals from music. MP3 encoding is lossy. It cannot recover details missing from the source, and neither a fixed percentage of size reduction nor preservation of cover art is guaranteed. Files without an audio track cannot produce an MP3. If a video has several languages, the first track may not match the default language in your player. Processing runs locally in the browser. Available memory and codec support limit which files work. Keep the tab open, download the completed file and check its language and playback before sharing.
Frequently Asked Questions
How do I convert MP4 to MP3?expand_more
Upload your files, confirm the conversion settings, and download your converted files. All processing happens in your browser — no server upload required.
Is this MP4 to MP3 converter free?expand_more
Yes, completely free with no hidden fees. No sign-up required, no usage limits. All conversion happens in your browser.
Is it safe to convert MP4 to MP3 online?expand_more
Your files never leave your device. All conversion happens locally in your browser using WebAssembly technology. We have zero access to your files.
Will I lose quality converting MP4 to MP3?expand_more
Quality depends on the target format and your settings. Lossless formats like PNG preserve original quality. For lossy formats like JPG, you can adjust the quality slider.
Can I convert multiple MP4 files at once?expand_more
Yes, you can convert multiple files at once. Simply drag all your files into the upload area or click to select them.
Common Issues
- infoMP3 encoding cannot restore detail missing from the source audio
- infoAAC-to-MP3 transcode adds a second lossy generation on top of the source
- infoVideo chapters, timestamps, and subtitle tracks are dropped entirely
- infoIf the MP4 has multiple audio tracks, only the first audio track is extracted