Add Audio to Video,
Perfectly Synced.
Replace or mix audio tracks in seconds. Add professional background music, crystal-clear narration, or immersive sound effects for free.
Step 1: Upload Video
Select a single file
Max size: 100MB
How to Add Music to Video
Seamlessly blend or replace audio tracks in five simple steps.
Upload Video
Select your video — MP4, MOV, or AVI.
Upload Audio
Select your track — MP3, WAV, or AAC.
Pick Mode
Choose to Replace or Mix audio tracks.
Set Volume
Adjust the volume levels for the new track.
Download
Export your finished MP4 video.
Professional Mixing Features
Replace or Mix
Full control over whether to swap the audio entirely or layer it with the original.
Smart Looping
Audio automatically loops if shorter than video, ensuring a consistent soundscape.
Lossless Visuals
We only re-encode the audio streams whenever possible to maintain peak video quality.
Flexible Formats
Supports MP4, MOV, WebM, AVI videos and MP3, WAV, AAC, M4A audio.
Volume Mastering
Precisely adjust the new audio from 0% to 200% for the perfect blend.
Transient Storage
Files are processed in memory and deleted instantly after completion for privacy.
Creative Sound Design
Adding the right audio track can transform a simple clip into a cinematic experience or a professional marketing asset.
Replace Bad Audio
Remove wind noise or unwanted chatter by swapping in clean music.
Add Narration
Combine your tutorial recordings with crystal-clear voiceover tracks.
Social Media Prep
Mix trending music with your original audio for Reels and TikToks.
Podcast Clips
Attach podcast audio to static video backgrounds for YouTube sharing.
Pro Audio Mixing Logic
Our tool uses advanced FFmpeg filters to blend your tracks flawlessly. Replace Mode removes all original audio streams entirely, while Mix Mode uses an amix filter to preserve both tracks.
Volume Balancing
Use the volume slider to lower background music to 20-40% when mixing with speech tracks for a professional finish.
Duration Matching
Don't worry about audio length. We automatically loop short tracks or trim long ones to match your video duration.
Frequently Asked Questions
Popular Conversions
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Add Audio to Your Video Now
No registration required. No watermarks. Fast, secure, and works on any device. Start mixing your media today.