Add Music to Video Online — MP3 Overlay Free
Layer an MP3 track over your video at the exact time range you need, or mute the original audio in a specific segment. The Audio Processor shows a timeline with draggable handles so you can align music with visuals precisely. Processing happens locally in your browser and exports MP4 — ideal for reels that need trending audio or voiceover replacement.
How to use this tool
- Open the Audio Processor and upload your MP4 or MOV video.
- Upload an MP3 file for the audio you want to add (optional for mute-only).
- Drag the timeline handles to set when the new audio starts and ends.
- Preview the mix to check timing against your visuals.
- Download the final MP4 with your audio changes applied.
Frequently asked questions
- Can I mute part of my video without adding music?
- Yes. Skip the MP3 upload and set a time range — the chosen segment will be muted while the rest keeps its original audio.
- What audio format is supported?
- MP3 files are supported for adding music or voiceover to your video.
- Does adding audio replace the original sound?
- In the selected time range, the new MP3 replaces the original audio. Outside that range, the original audio is preserved.
- Can I add music to video without uploading to a server?
- Yes. Both your video and MP3 are processed locally in the browser. No cloud upload is required.