Beat Extender

A beat extender takes a beat, instrumental, or loop that ends too soon and makes it run longer, so it fills the time you actually need. Audjust does this by finding the natural beats and section boundaries in your track, then repeating and rejoining them so the longer version keeps its groove instead of sounding like a hard copy-paste.

To use it, open the editor in your browser and drop in your file (MP3 or WAV both work). Set the target length you want, longer than the original. Audjust marks the beat points and builds the extended version. Play it back, nudge the loop or cut points if a transition feels off, then export.

This helps when a beat is shorter than the verse you're recording over and you need another sixteen bars, or when a workout, dance, or game loop has to run for a set number of minutes without an obvious restart. It's also useful for matching a backing track to the length of a full performance, or fitting a loop to a video or reel of a fixed length.

One thing worth knowing: extension works best when it repeats on a clean musical boundary, so a steady beat or loop extends more smoothly than a track with a one-off intro fill. If a join sounds abrupt, move the loop point to the start of a bar.

The question most people ask is whether it generates brand-new beats. It doesn't. It rearranges and repeats the audio you already have to reach your target length, which is why the result still sounds like your original beat. The same editor can also shorten or trim a track if you need it tighter.

It's free, needs no signup, and runs right in your browser.