Add music to video

Put a song under a video's sound: set both volumes, start the song where you like, fade it in and out, loop it, and let it dip whenever someone talks. Hear the mix, then download it. Nothing is uploaded.

Music volume30%

The video's own sound100%

Start the song at0:00

Skip a slow intro, or start on the chorus.

Lower the music when someone talksIt dips under the voice and comes back up in the pauses.Fade inOver the first 1.5 seconds.Fade outOver the last 3 seconds.Loop the songPlays it again if it ends before the video does.

The video

An example: 8 seconds of IMPAULSIVE

The music

Making the example tune…

MP3, M4A, WAV, OGG or FLAC for the music. Both stay on your device: nothing is uploaded.

Free, no watermark, nothing to sign up for. Videos up to 60 minutes at a time.

How to add music to a video

Choose the video (MP4, MOV, WebM or MKV) and the song (MP3, M4A, WAV, OGG or FLAC). The example tune is there to try it with.
Set the volumes. The music usually sits around 20 to 30%, the video's own sound at 100%. Turn the video's sound down to zero to have only the music.
Shape it: start the song where you want (skip a slow intro), fade it in over 1.5 seconds and out over 3, loop a short track, and have it dip when someone talks.
Play it to hear the mix as it will be, then Add the music and download the MP4.

How loud the music should be

Music under a voice is there for mood, not to compete. The words come first: if a viewer has to strain to hear them, they scroll. A few rules of thumb:

Music volume for different kinds of video
The video	Music volume	Dip when talking
Talking to the camera, a podcast clip	15 to 25%	On
A tutorial or a voiceover	20 to 30%	On
A vlog with some talking	30 to 45%	On
A montage, travel or B-roll with no talking	70 to 100%	Off
Music only (the video's sound off)	100%	Off

The dip lowers the music by about 9 dB as each line starts and brings it back up slowly in the pauses, the way editors do it by hand, so the voice always sits on top.

Music you're allowed to use

Adding a song to a video doesn't give you the right to post it. Commercial songs are found by automated systems like YouTube's Content ID, and the song's owner can block the video or run ads on it and take the earnings. Safer choices:

Your own music, or music you've paid to license for this use.
Free libraries such as YouTube's Audio Library, within each track's terms (some ask you to credit the artist).
The apps' own sounds. On TikTok and Instagram, pick a sound in the app as you post: the app licenses its library for use there (business accounts get a smaller, commercial one), which a song mixed into the file doesn't have.

For more on what gets videos claimed, read how to add music to a video and YouTube's reused content policy.

Music on clips

Short clips cut from a long video often get a quiet bed of music to lift the pace. Mix it in here, or keep the clip's own sound and add a trending sound in TikTok or Instagram as you post. To make the clips, the video trimmer cuts one moment out by hand, and the video merger joins several into one.

Clyper does the cutting for a whole video: paste its YouTube link and it finds the moments worth posting, cuts each on whole sentences, frames it vertically on whoever's talking and captions every word.

Questions

How do I add music to a video for free?

Choose your video and your song here, set how loud the music is, and press Add the music. It's mixed on your device and you download an MP4 with the music under the video's own sound: no watermark and nothing to sign up for.

How loud should background music be?

Well under the voice: people should hear every word without trying. Start around 20 to 30% and play it through; with Lower the music when someone talks on, the music also drops by about 9 dB under each line and comes back in the pauses.

Can I use any song?

Only music you have the rights to: your own, a royalty-free track whose license covers your use, or a library like YouTube's Audio Library. A commercial song can get your video claimed or blocked. On TikTok and Instagram, a sound added in the app as you post is the safer way to use popular music.

Does it change the picture?

No. The picture is copied into the new file exactly as it was, so the quality and size stay the same. Only the sound is new: the video's own sound and the music, mixed at the volumes you set.

What if the song is shorter or longer than the video?

A shorter song plays again from where you started it, with Loop the song on; off, it ends and the video carries on with its own sound. A longer one is cut at the end of the video, faded out over its last 3 seconds.

Is my video uploaded?

No. Both files are read and mixed in your browser, so they never leave your device. It works on videos up to 60 minutes long.

Clips worth the soundtrack

Paste a YouTube link and Clyper finds the moments worth posting, cuts each one on whole sentences, frames it vertically and captions every word: up to 30 clips per video.