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
ファイルを選択使い方
- 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.
よくある質問
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.
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.
活用ガイド
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.
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.