Audio Length Increase

This tool makes an audio file longer until it reaches the exact duration you type in. Rather than pasting a loop onto the end or padding with a fade, it finds the beats and section boundaries inside the track and repeats the right parts at those seams, so the longer version still plays as one continuous song.

To use it, open the editor, upload an MP3 or WAV, and let it analyze the audio. Type a target length longer than the original. Audjust extends the track to hit that time and marks the join points on the timeline so you can drag them to better spots. Preview, then export.

The usual reason to do this is fitting music to a video, slideshow, or reel that runs longer than the track. If your clip is three minutes and the song stops at two, you can add the missing minute without an obvious loop. The same goes for a performance or presentation that needs music to fill a fixed slot.

It works best when you add a moderate amount instead of doubling a very short clip. Tracks with more distinct sections give it more places to splice, so the added time sounds cleaner.

Does extending the song slow it down or drop the pitch? No. It does not time-stretch the audio; it repeats and rejoins sections at the beat, so tempo and pitch stay exactly the same.

It runs right in your browser, with no signup or install.