Extend Music AI

If you searched "Extend Music AI" wondering whether the AI writes new music to pad your song, the answer is no. Audjust does not invent new sound. It reads the parts already in your track and repeats them in a way that holds together, so the longer version stays true to the song you started with.

Here is what it actually does. Audjust detects the track's beats and finds where sections start and end, then stretches it to the length you set by repeating and rejoining whole sections, verses, choruses, instrumental passages, at points the ear accepts. The result flows like the original rather than cutting off or jumping mid-phrase. It runs in your browser, free, with no signup or install, and works with MP3, WAV, and other common files.

To use it: open the editor, load your audio by uploading a file, and let it mark the section boundaries. Type the target length, play back the joins, then export.

This solves a specific problem: your video, reel, or slideshow runs longer than the song, and you do not want the music stopping dead or fading early. The same applies to a stage performance or a presentation that has to fill a fixed block of time.

One thing worth knowing: extending works best when you add musically. A target that lands near a natural section length hides the joins. Asking for one odd extra second in the wrong spot is harder to make clean.