UseTool

Combine videos with music

Join several clips and add one continuous music track.

Choose videosMP4 · MOV · WebM · MKV
Choose audio

🔒 Your files stay on this device.

How it works

How it works

  1. 1

    Add what goes in

    Add a video and an audio file together — the tool needs both before it can start.

  2. 2

    Start it

    Set the order of the clips and the volume of the music, then start. Everything runs in this browser — no upload, no queue, no account.

  3. 3

    Take the result

    The MP4 · WebM is ready the moment the run finishes. Save it straight to your device.

What this tool does

Combine videos with music
Joins several clips one after another and lays a single music track over the whole thing. The clips keep their own sound underneath unless you turn it down; the music runs across the cuts without restarting.

When you need this

  • Short clips from a sports season should run together under one song.
  • Several drone shots should become a single video with background music.

Supported formats

MP4MOVWebMMKV + MP3M4AWAVOGGFLAC → MP4WebM

Good to know

Frequently asked questions

What files can I use here?

Needs a video and an audio file together.

What do I get back?

You get MP4 · WebM.

Does the file lose quality?

Every frame is decoded and encoded again. That is what makes the file smaller or different — and it costs some detail, most visibly in fast motion and fine texture.

When does it not work?

Which video codecs work depends on your browser. Chrome and Edge read the most, including H.265 on many machines; Safari and Firefox refuse some. A file that will not open here usually opens in Chrome.

Does the video lose quality?

Only when it has to be re-encoded. Cutting, joining and removing the sound track copy the picture data unchanged, so those are lossless. Compressing and adding a watermark do re-encode, which is why they take longer.

How long may a video be?

There is no fixed limit. What decides is the memory of your device: a phone manages a few minutes comfortably, a computer handles far more. If a long video fails, splitting it first and working on the parts usually helps.

Private by design

Your files stay on your device

Your files stay on this device.

Other tools

Ready-made

Workflows for this file type