Add Audio to Video
Mix and add high-quality MP3 audio tracks to your video without losing original quality.
Drop video or click to upload
MP4, WebM, MOV · 2 GB
How to Add Audio to Video (MP3 Mixing)
Upload Video & Audio
Upload your original video (MP4, WebM) and the audio track (MP3, WAV) you want to add.
Adjust Offset & Volume
Drag the audio waveform on the timeline to set the start time, and adjust the volume or mute for both tracks.
Mix & Download
Click the 'Mix Video + Audio' button to merge them into a single file with absolutely zero loss in video quality.
Frequently Asked Questions
Q.Can I mute the original video sound and keep only the new MP3?
Yes! Simply mute the video track or slide its volume to 0. The final video will only contain your newly added audio.
Q.Does adding audio reduce the video quality?
Not at all. We use a direct stream copy for the video, ensuring 100% original visual quality is preserved.
Q.Can I precisely position when the audio starts?
Absolutely. By dragging the audio waveform on the timeline, you can set the exact delay/offset for the audio to play.
Q.What audio file formats are supported, and is there a file size limit?
We support a wide range of popular formats including MP3, WAV, and M4A. There are no limits on file size or video length, allowing you to edit and merge your audio tracks freely.
Q.Can I add and mix multiple audio tracks at once?
Yes, you can add multiple background music or sound effect files simultaneously. Each track can have its own custom start position (offset) and volume levels for advanced sound editing.