MP4 to MP3 Converter
Convert MP4 files to MP3. Processed inside your browser — files never leave your device.
Drop your MP4 file here
or click to choose
Choose fileHow to use
- Drop or choose the MP4 file to convert.
- The output format is preset to MP3. Adjust the quality (bitrate) if you like.
- Hit 'Convert to MP3' — it converts inside your browser and downloads right away.
Frequently asked questions
Are my files uploaded to a server?+
No. Conversion happens entirely inside your browser and your file is never sent anywhere.
Which video formats are supported?+
Besides MP4: MOV, WebM, MKV and most other common video files.
Is my video safe?+
Yes. Video files are processed inside your browser too — never uploaded.
Does extracting audio from video reduce the quality?+
The audio inside an MP4 is usually AAC, which compresses differently from MP3, so it is re-encoded. A generous bitrate is used, so for speech-led content like lectures and interviews the difference is hard to notice.
Is there a file size limit?+
No server limits. Typical music files are effortless, and desktops handle files up to hundreds of MB.
Is it really free?+
Yes. No sign-up, no payment, no conversion limits and no watermark.
Can I pick a different output format?+
Yes — on the converter you can switch the output between MP3, WAV, FLAC, M4A and OGG.
Guide
Why extract MP3 from MP4?
When only the sound matters — lectures, meetings, talks — there's no need to carry the whole video. Extracting to MP3 cuts the size to a tenth or less, perfect for listening on the go.
It's also handy for turning audio from your own footage into a standalone file.
When do you need just the audio from an MP4?
Lecture and seminar recordings, filmed interviews, video podcasts — often only the sound matters, yet you are carrying the whole video. Video data accounts for most of the size, so keeping only the audio shrinks the file dramatically.
Listening on the move, handing a recording to someone for minutes, uploading to a speech-to-text service: all of these need audio only. The sound inside an MP4 is usually AAC, so moving it to MP3 makes it play in any player.
What happens to quality and size?
The audio track inside the video is extracted and encoded to MP3, preserving the sound quality of the video.
Compared to the video (often hundreds of MB), the result is just a few MB. Long videos can take tens of seconds to process.