Free Add Music to Video Online
Add background music or replace audio in any video — instantly, for free.
Upload your video and audio file, choose to replace or mix the soundtrack, and download your finished video in seconds. Perfect for TikTok, Reels, YouTube Shorts, and any content that needs the right music.
Video File
Drop video here
MP4, MOV, AVI, MKV, WebM
Audio File
Drop audio here
MP3, WAV, AAC, OGG, M4A
Editing is a pain in the ass, right?
That's why we're building Cubix. No more editing hell.
AI Video Editor
Drop your footage, tell it what you want. Cubix cuts, captions, color grades, and exports — fully on its own. No timeline. No manual work. Just results.
Cinematic Screen Recorder
Hit record on Windows. Auto-zoom, cinematic backgrounds, and studio-quality audio kick in automatically — your screen recording looks edited before you've touched a thing.
Add Music to Any Video in 3 Steps
Add background music or swap audio tracks with Cubix — fast and completely free.
Upload Video & Audio
Click or drag and drop your video (MP4, MOV, AVI) and your music file (MP3, WAV, AAC).
Choose Replace or Mix
Replace mode swaps the audio entirely. Mix mode blends your new music with the existing soundtrack.
Download Instantly
Preview your video with the new audio and download it — no watermark, no login needed.
Audio Merger
Replace or mix audio tracks
Replace
Swap audio track
Mix
Blend both tracks
Replace Audio
Swap out the original audio track entirely with your chosen music or sound effect — perfect for muting and re-scoring.
Mix Audio
Blend new background music with the existing video soundtrack for layered, professional-sounding audio.
Fast & Free
Video stream is copied directly — only the audio is re-encoded — so processing is lightning-fast with no quality loss.