Contents
Why use this free toolHow to add music to a video in 3 stepsWhat automatic ducking doesAdd music to any kind of videoUse the add music tool on any deviceSafe, private and freeThis tool vs other ways to add musicPopular usesHow adding music worksAdd music tool features at a glanceFor developers: the ffmpeg commandFrequently asked questionsBackground music makes a video feel finished — but too loud and nobody can hear what is said, too quiet and it might as well not be there.
Rekreate's free tool gets the balance right automatically. Choose a music volume, and the music is lowered whenever there is speech and comes back up in the gaps, just like a professional edit. It also fades in and out and loops to fill the whole video.
Why use this free tool
Add background music to any video
Upload a video and a music file, get a video with music.
Music gets quieter when people talk
Automatic ducking keeps speech clear without making the music disappear.
Smooth fade in and fade out
No abrupt start or stop.
Music loops to fit
A short track repeats; a long one is cut at the end of the video.
Works with silent videos too
A video with no sound gets the music on its own.
No watermark, no sign-up
Free and clean.
How to add music to a video in 3 steps
Upload the video and the music
Video in the first box, MP3 or other audio in the second.
Set the music volume
10–50%. Leave ducking and fades on for the best result.
Download
Press Start and save the MP4 with music.
What automatic ducking does
Add music to any kind of video
Talking videos and vlogs
Music stays under the voice thanks to ducking.
Travel and family videos
Turn a silent or noisy clip into a memory with a soundtrack.
Product and promo videos
Add energy to a product showcase.
Slideshows and GIFs
Convert a GIF to video first, then add music.
Reels and TikToks
Add a track before uploading.
Any audio format
MP3, WAV, M4A, AAC, FLAC and OGG.
Use the add music tool on any device
On Windows PC and Mac
Add music to videos in any browser on Windows or Mac.
On iPhone and Android
On iPhone or Android, pick a video and a song file and save the result to your gallery.
In any modern browser
Chrome, Safari, Edge and Firefox all work. There is no app, plugin or extension to install — the processing happens on our servers, so an old laptop is as fast as a new one.
Safe, private and free
No account, no sign-up
Open the page and use it. There is nothing to register and no email address to hand over.
Files deleted automatically
Your upload is deleted the moment processing finishes, and the result 60 minutes later. Files are not shared, published or used for anything else.
Encrypted in transit
Uploads and downloads go over HTTPS, the same encryption your bank uses in the browser.
No watermark, ever
The file you download is clean. No logo in the corner, no intro card, no "made with" frame at the end.
This tool vs other ways to add music
vs. adding music in the social app
In-app music is only available on that app and may be removed later. Adding it to the file keeps it everywhere.
vs. basic audio tools
Most set one fixed volume, so either speech or music suffers. Ducking fixes that.
vs. video editors
Editors can duck music, with keyframes set by hand. Here it is automatic.
Popular uses
Add music to a vlog
Keep the voice clear and the mood up.
Make a travel video with a soundtrack
Replace wind noise with music.
Add music to a product video
For a store page or ad.
Put a song on a birthday video
A finished video to share with family.
Add music to a tutorial
A quiet bed under the explanation.
How adding music works
Your video and music are uploaded over HTTPS and processed on Rekreate's servers with FFmpeg. The music is looped or cut to the length of the video, set to your volume, and faded in and out. With ducking on, a compressor listens to the video's own sound and lowers the music whenever there is speech, then lets it back up in the pauses.
The music and original sound are mixed into one track, and the picture is copied without re-encoding when possible. Uploads are deleted after processing, results after 60 minutes.
Add music tool features at a glance
| Music volume | 10%, 20%, 30% or 50% |
|---|---|
| Automatic ducking | Music lowered during speech |
| Fades | Fade in and out |
| Output | MP4, same length as the video |
| Price | Free |
| Sign-up | Not needed |
| Watermark | None |
| File size | Up to 95 MB per file |
| Video length | Up to 10 minutes |
| Files kept | Upload deleted after processing, result after 60 minutes |
For developers: the ffmpeg command
Music ducked under speech on your own machine.
ffmpeg -i video.mp4 -stream_loop -1 -i music.mp3 -filter_complex "[1:a]volume=0.2[bed];[0:a]asplit=2[voice][key];[bed][key]sidechaincompress=threshold=0.05:ratio=8:release=400[duck];[voice][duck]amix=inputs=2:duration=first[a]" -map 0:v -map "[a]" -c:v copy -c:a aac -shortest output.mp4sidechaincompress- Lowers the music whenever the voice is loud.
Frequently asked questions
How do I add music to a video for free?
Upload the video and the music file above, choose the music volume, and press Start.
Will the music drown out people talking?
No. With ducking on, the music is lowered automatically whenever someone speaks.
What music volume should I choose?
20% for videos with talking, 50% for videos without speech.
What if the song is shorter than the video?
It loops to fill the video.
What if the song is longer than the video?
It is cut at the end of the video and faded out.
Can I add music to a video with no sound?
Yes, the music becomes the video's soundtrack.
Can I use any song?
You can upload any audio file, but only use music you own or have a license for — platforms detect copyrighted songs and may mute or block the video.
Can I do this on my phone?
Yes, on iPhone and Android.
Is there a watermark?
No.
What is the maximum size?
Up to 95 MB per file and 10 minutes.
Can I replace the original sound with music?
Yes, use add audio to video in replace mode.
Does the video lose quality?
No, the picture is copied without re-encoding when possible.
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