Video Add Audio / Music

About Video Add Audio / Music

The Video Add Audio tool is a high-utility media merger that allows you to replace the sound in your video file with a new audio track. Whether you're adding background music to a vlog, a voice-over to a tutorial, or a high-quality soundtrack to a recorded performance, our tool provides a seamless and secure solution. It intelligently handles the merging process, ensuring the video and audio are correctly synchronized. A key benefit of our tool is that it uses 'video stream copying,' which means the video quality is never downgraded because it isn't re-encoded. Only the audio is processed and muxed into the final file. Built with total privacy in mind, all merging occurs locally on your device using FFmpeg.wasm. Your private videos and audio files are never uploaded to any server, making it the most secure way to handle your creative assets.

How to use Video Add Audio / Music

1. First, upload the 'Source Video' file that you want to add audio to.
2. Next, upload the 'New Audio' file (supports MP3, WAV, AAC, and more).
3. The tool will automatically detect the lengths of both files to ensure a proper merge.
4. Click 'Merge Audio & Video' to begin the local, high-speed muxing process.
5. Preview the result with the new audio and download the final merged video to your device.

Use cases for Video Add Audio / Music

• Adding a professional music track or background score to personal or social media videos.
• Replacing low-quality original audio from a camera with a high-fidelity separate recording.
• Adding a voice-over or commentary track to instructional videos and software demos.
• Creating custom music videos by merging a high-quality audio file with a specific video clip.
• Synchronizing a clean audio track with a recorded presentation or webinar for better quality.