Audio Extender

An audio extender makes a track run longer than its original length. Audjust does this by analyzing your audio to find its beats and section boundaries, then repeating and stitching whole sections, a chorus, a verse, an instrumental passage, so the longer version keeps its rhythm. Because it cuts on the beat instead of looping the whole thing back to the start or fading out and in, the added time doesn't sound like an obvious repeat.

To use it, upload an MP3 or WAV and let it analyze the track. Then drag the end out to your target length, preview where the added sections land, and export the longer file. It runs in your browser, it's free, and there's no signup or install.

This helps when a track is shorter than the video, reel, or slideshow it sits under and you need it to fill a fixed runtime, say a three-minute clip, without silence at the end. It's also useful for performances, ceremonies, or presentations that have to last a set amount of time.

One tip: extend where a section ends, like the close of a chorus or verse, rather than mid-phrase. The tool aims for beat-aligned cut points, but adding length at a natural break sounds cleaner than cutting through a build-up.

People often ask whether this creates new music. It doesn't. It rearranges and repeats the audio you upload to reach a longer runtime, so every second comes from your original track, never invented sound. If you'd rather make a track shorter, the same editor trims and tightens it too.