Extend Music With AI

This tool makes a song longer so it reaches a length you set, without an obvious looped repeat or a sudden jump. Audjust finds the beats and section boundaries in your track, then repeats and stitches the right parts so the longer version still flows like one song. It runs in your browser, works with files like MP3 and WAV, and needs no signup or install.

To use it, upload a file and let it analyze the track. Type the duration you want, like 3:00, or drag the end of the timeline to the new length. The tool adds time at natural section points, then you preview and export.

The usual reason to do this is filling exact time. If your video, slideshow, or stream runs three minutes but the song ends at two, you can stretch the music to cover the gap instead of trimming the footage or fading out early. It also helps for walk-on music, presentations, and background tracks that need to run past the original length.

One thing to know: this works best when the song has a clear, repeating section to draw from. A track that builds steadily and never repeats gives it less to reuse, so the added length can be more noticeable.

Does it generate brand-new music? No. It does not invent new notes or instruments, and it does not change the speed. It rearranges and repeats parts of your own recording to hit the length you want, so it still sounds like the original song.