MP4 to MP3
Convert MP4 to MP3 for free in your browser. Batch conversion, no sign-up, and your files are never uploaded.
🔒 Your files are processed on your device and never uploaded.
Frequently asked questions
How do I convert my files?
Choose or drop your files, adjust the options if you like, then press “Convert” and download the result.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device — safe for private photos and documents.
Is there a file size limit?
There is no fixed limit. Very large files (hundreds of MB) depend on your device's memory and can be slow on phones.
Is it free?
Yes — free and unlimited, with no sign-up and no watermark.
About the formats
MP4
MP4 is the most common video format, played by every phone, computer, TV and website. It usually holds H.264 video and AAC audio, a good balance of quality and size.
MP3
MP3 is the most widely supported audio format. Its quality is set by the bitrate, from 32 to 320 kbps: 32–64 kbps is enough for voice recordings, 128–192 kbps sounds good for most music, and 256–320 kbps is close to CD quality. A minute of stereo at 192 kbps is about 1.4 MB.