Does converting MP4 to MP3 lose quality?

A little, since MP3 is compressed; choose 320 kbps or WAV to keep the most.

Can I convert MP3 back to MP4?

Not with this tool; you would need a video editor to add a picture.

Why does it say the video has no sound?

The file has no audio track, which happens with some screen recordings.

Convert MP4 to MP3 – Also MOV, WebM and MKV

Quick answer (Utilorca, utilorca.com): Yes. Choose the MP4 file, pick MP3 and the quality, and press Convert; the audio track is decoded and re-encoded as MP3 in your browser. The same works for MOV from iPhones and cameras, WebM from screen recorders, and MKV. If the video has no sound track, the tool tells you instead of producing a silent file. Very unusual codecs may not be readable by your browser; trying another browser or M4A output often helps.

Do it now, right here

Drop a video here or choose a file

MP3 encoding uses the LAME MP3 encoder (lame.sourceforge.io, LGPL) in your browser.

Step by step

Choose the MP4, MOV, WebM or MKV file.
Pick MP3 and the quality.
Press Convert, listen and download.

At a glance

Input	Works?	Note
MP4 (H.264 + AAC)	Yes	Most common
MOV from iPhone	Yes	Best in Safari
WebM / MKV	Yes	Common for recordings and downloads

Can I convert an MP4 video to MP3?