Extend Song Length Online

This tool makes a song longer in your browser. You set the duration you need, and it reaches that length by repeating beats and whole sections at the points where the music already changes, so the extra time blends in instead of looping every few seconds or cutting off mid-phrase.

To use it, open a song by uploading an MP3 or WAV file. The track is analyzed for its beats and section edges. Type or drag to a target length longer than the original, and the tool fills the gap by stretching existing parts at those edges. Play it back to check the joins, then export.

This helps when a song is shorter than the video, reel, or slideshow it needs to cover, or when a performance, presentation, or background track has to run for a set number of minutes.

Worth knowing: it extends by reusing the song's own material, not by generating new music. The result holds up best when you spread the added time across the track instead of padding one spot, since that keeps the repeats from stacking up in the same place.

Can you actually make a song longer online? Yes. Because the added time is built from sections that already match the song's beat and structure, a well-placed extension is hard to spot, and far cleaner than pasting copies of the file end to end.

The same editor can also shorten a track or trim its intro and outro. It is free, runs in the browser, and needs no install or account.