Increase Audio Length Online

This page is also available in other languages: Deutsch, 한국어, 日本語, Español, Português (Brasil), Français

Audjust makes an audio file longer without it sounding stretched, slowed down, or crudely looped. It finds the beats and section boundaries in the track, then repeats the right segments so the longer version still flows like the original.

To use it, open the editor, drag in an MP3 or WAV, and let it analyze the track. Type the new target length, and it builds the extended version by repeating sections at beat-aligned points. Preview it, drag where the extra time gets added if a spot feels off, then export.

The most common reason to do this is video. If your reel, slideshow, or presentation runs 90 seconds but the song only goes 70, you can push the audio out to 90 so it covers the whole thing instead of dropping to silence early. Background tracks for streams or kiosks that have to fill a set runtime are another fit.

Extending works best when the song has clear, repeating sections. It can't invent new melody, so it adds time by reusing parts that are already there. A track with a steady beat extends more cleanly than a free-form or constantly-changing one.

Will it sound looped? Usually not, because each repeat is cut on the beat and at section edges instead of at a random point. If one stretch starts to feel repetitive, move where the added length goes and preview again before exporting.

That's the whole tool: it changes a song's length. You can also shorten or trim a track the same way if you need it shorter instead.