Music Extender AI

This tool makes a song you already have longer, stretching it to hit an exact target time without an obvious loop or a clumsy repeat. It reads the track's beats and section boundaries, then repeats and rejoins parts at those musical points so the longer version still flows.

To use it, open the editor and upload an audio file (MP3 and WAV both work). Set a length longer than the original, say 4:30 from a 3:10 track. The tool picks cut and repeat points on the beat, builds the extended version, and lets you preview it. If a join sounds off, drag it to a nearby beat, then export.

This helps when a video, reel, or slideshow runs longer than the song and you need the music to fill the whole thing. It also works for a dance routine, a presentation, or any performance that has to last a set number of minutes.

One thing to be clear about: it extends a real recording by repeating its own verses, choruses, and bridges, so it works best with a steady beat and distinct sections. It does not compose new music or invent extra lyrics.

Will the longer version sound patched together? Because every join lands on a beat and a section edge instead of an arbitrary spot, most listeners won't catch them, and you hear the result before you commit. It runs right in your browser, it's free, and there's nothing to install.