Music Extender Online

This extender works in the browser, so you can make a song longer without installing software or making an account. Drop in an MP3 or WAV, set the length you want, and it lengthens the track to reach that time. Instead of looping the whole file end to end, it detects the beats and section boundaries and repeats internal parts, so the longer version still sounds like one continuous song.

To use it: upload your file, then wait a few seconds while it analyzes the audio. Drag the handle to your target length or type an exact time, like 3:30. Play the result on the timeline, move where the extra bars are added if a seam stands out, then export the audio.

It is useful when a track ends before your video or reel does and you need it to cover the full runtime. The same applies to slideshows, presentations, or a performance where the music has to fill a fixed block of time without a fade-out or silence at the end.

Extensions sound cleanest when the added length comes from repeating a section, so keep the jump reasonable rather than asking to double a short clip. The closer the target is to the original, the better the repeated bars match and the harder the joins are to hear.

A common question: does this generate new music? No. It only reworks the audio you upload, repeating existing sections to hit your length while keeping the song recognizable. It runs in your browser, free, with no signup.