Extend Audio AI

This page makes an audio file longer. Give it a clip and a target length, and it stretches the track to fill that time. Instead of fading or pasting the same loop end to end, it detects the song's beats and section boundaries and repeats whole musical phrases on those breaks, so the longer version still plays as one continuous piece.

Upload an MP3 or WAV, wait for the track to load, then set a duration longer than the original. The editor builds the extension on the natural section breaks. Play it back, drag the added section to move where the repeat falls, and export. Everything runs in your browser, free, with no signup or install.

People usually come here for a fixed-length target: a 90-second song that has to cover a two-minute video or slideshow, or a short music loop that needs to run the full length of a stream, performance, or presentation without a noticeable seam.

It works best when the track has a repeatable part to draw from, like a chorus or a steady groove. A short passage that keeps changing gives the tool less to reuse, so the more musical material you start with, the cleaner the result.

The question most people ask: does it generate new music with AI? No. It analyzes the audio you already have and rearranges its own beats and sections to reach the length you want, so the result stays faithful to the original recording.