Add Music to Video
Put a soundtrack under any clip and balance the mix.
Free · No upload · No sign-up · No watermark
How to add music to a video
- 01
Open your video and music
Drop in a video, then pick a free song from the library or add your own MP3, M4A or WAV.
- 02
Mix
Trim the song, choose where it starts, set fades and balance it against the original audio.
- 03
Download
Export a single MP4 with the new soundtrack.
Why use Cutlia for this
Free music library
Popular royalty-free songs — meme classics, upbeat, chill, epic and more — free to use in your videos.
Volume balance
The music dips automatically while people talk, so voices stay clear — or replace the original sound entirely.
Fade in and out
Smooth fades so the music doesn't start or stop abruptly.
Loop to fit
Short tracks can loop automatically to cover the whole video.
Frequently asked questions
Is the music really free to use?
Yes. Every song in the library is public domain, CC0 or licensed under Creative Commons Attribution — free for any video, including monetized ones. Some songs ask for a credit; Cutlia shows the exact text to paste into your video's description.
Can I keep the original sound?
Yes. Mix the music with the original audio and set each volume independently, or mute the original completely.
Is my video uploaded to a server?
No. Cutlia processes your video directly in your browser using WebAssembly and your device's hardware. The file never leaves your computer or phone, so it stays completely private.
Is it really free?
Yes. Cutlia is free to use with no account, no trial and no watermark on your export. The site is paid for by the ads on it, and your files never leave your device.