Make Song Longer

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This free tool lengthens a song by repeating parts of it until the track reaches the exact duration you set. Instead of looping the whole song back to the start or pasting a rough copy, Audjust finds the beats and section boundaries inside the audio and rejoins sections on the beat, so the longer version still flows and ends where it should.

To use it, open Audjust in your browser and upload an audio file (MP3 and WAV both work). Set a target length longer than the original. The tool repeats and stitches sections together to hit that length, then you preview and download the result. Everything runs in the browser.

A common reason to do this is matching a song to something with a fixed runtime: a three minute video, a slideshow, a dance routine, or a presentation that runs longer than the music you have. Extending the track to that length saves you from silence at the end or restarting the song partway through.

One thing to know: the result sounds best when the extra length lands inside repeating parts, like a chorus or a steady instrumental section, rather than across a one-off intro or a final fade. With the joins on beat boundaries, the seam is hard to hear.

The question most people ask is whether this writes new music. It doesn't. It rearranges and repeats the audio you already have to reach the longer duration, and it doesn't time-stretch or change the pitch, so the sound stays true to the original recording.