Extended Music AI

Searching for "Extended Music AI" usually means you want a track longer than the original, stretched to a specific running time without an obvious loop or a jarring repeat. That's what this does: it analyzes the song, detects its beats and section boundaries, and rebuilds it at the length you set so the added time blends in.

To use it, open the editor and upload an audio file. The tool reads the track and marks natural cut points. Type the duration you want, longer than the original, and it repeats and rejoins whole sections on the beat. Preview the result, then download. Everything runs in your browser, so nothing installs and there's no account to make.

One thing to be clear about: this extends a track by reusing the music already in it, not by generating new melodies or instruments. A longer version is built from real sections of your song, so it stays true to the original rather than inventing notes that weren't there.

Common cases: you have a 90-second song but a three-minute slideshow, and the music needs to last the whole way without restarting; or a short backing track that has to cover a longer stage performance or presentation.

A practical tip: the joins are cleanest at section changes, like the start of a chorus or verse, where the music naturally turns over. Pick those points and the seams stay hard to hear.

Yes, it's genuinely free, it works with common formats like MP3 and WAV, and the extended file is yours to download and use.