Extend Song With AI

This page extends a song so it plays longer than the original recording. Audjust analyzes the audio, finds its beats and section boundaries, then repeats a full musical section to add the time you need. Because the repeat lands on a real section break, where the music already resets, the longer version flows instead of restarting awkwardly.

To use it: open the editor, upload an MP3 or WAV, and let it analyze the track. Type the length you want, longer than the original, in minutes and seconds. The tool extends the song to hit that target and marks where it added the repeated section. Preview it, drag the cut points if a join sounds off, then download.

The common reason to do this: a video, reel, or slideshow runs longer than the song, and you want the music to fill the whole thing. It also helps for a dance routine, a walk-on, or a presentation that has to reach a fixed cue at a set time.

Is this AI that writes new music? No. It does not generate new melodies, instruments, or extra bars. It detects the song's structure and reuses the song's own audio, so the longer version is the same recording with a clean repeat added. For the best result, extend by a whole section rather than a few seconds, since short repeats are where joins tend to stick out.

Everything runs in your browser, free, with no signup or install. If you instead need a song to be shorter, the same editor trims and shortens it the same way.