Extend A Song With AI

This page is for when a track is too short and you need it to run longer. Audjust detects the song's beats and section boundaries, then repeats and rejoins the right parts so the longer version flows on the beat instead of cutting or repeating crudely. It runs in your browser, it's free, and there's no signup or install.

Upload an MP3 or WAV, let it analyze the audio, then set a target length longer than the original. The new joins land on natural beats and section edges, and you can preview the whole thing before exporting.

This helps when a song ends before your video or reel does and you need the music to reach the final frame. It also works for a presentation, a stage walk-on, or a slideshow that runs longer than the track you picked.

If you searched for an AI extender, here's the honest part: this does not generate new music. It writes no new notes or instruments. It rearranges the audio you already have, choosing cut points on beats and section boundaries, so the result is the same song, just longer.

That approach works best when there's a section worth reusing, like a chorus or a steady groove. Pushing a very short clip far past its length means more repeats, so listen through once after a big stretch to check the repeated parts don't stand out.