Add Audio to Video
Add music, voice or recordings to video. Trim tracks, set insertion times, volumes and fades, then export MP4.
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About this tool
Add up to five tracks or record in your browser. Drag waveform handles to trim, set timing and volume, and choose two fade curves. Keep, lower or mute original sound.
How to use
- Choose one video, then add audio or record.
- Read previews and waveforms; set trims, times, volumes and fades.
- Export the video, review playback and download.
Frequently asked questions
What if the audio and video have different lengths?
Video duration stays unchanged. Audio is trimmed at the video end or padded with silence, without automatic looping. Fades apply to each trimmed track.
What are the limits?
Video: 200 MiB, 1 hour, 3840×2160 or portrait equivalent with even dimensions. Up to five audio tracks, each 20 MiB and 1 hour. Total input 300 MiB; output 200 MiB. Recording needs microphone permission.
Discussion & comments
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