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How to Add Background Music to a Video — Loop, Volume, Fade

Lay music over a silent vlog or timelapse. Short tracks loop automatically to fill the video, and you choose whether to mix with or replace the original sound.

FileKeeps2026-08-15 · 3 دقيقة قراءة

A silent timelapse, a travel clip with nothing but wind noise — one music track transforms it. No editing suite needed: with the video and an audio file, it's done in the browser.

How — three steps

  1. 1Open Add Background Music and add your video.
  2. 2Add the audio file to use as the soundtrack.
  3. 3Adjust volume and fade in/out, decide whether to keep the original sound, and hit create.

A short track is fine

If the music is shorter than the video, it loops automatically to fill the whole length; if longer, it's trimmed to fit. With fade-out on, the music eases away just before the video ends.

TipIf the video has speech, keep the original sound on and set the music to 20-30% volume — atmosphere without burying the voice.

You can pick sections, too

Want to start from the chorus, or score only part of the video? Set a range on the music and the video independently. The result saves as MP4, processed entirely in your browser — nothing is uploaded.

One note on music rights

If the video is headed for YouTube or similar, check that you're allowed to use the track. Free libraries like the YouTube Audio Library are a safe bet.

A video and a music file — that's all it takes.

Open Add Background Music