Free Tool
Add Audio to Video
Combine a video with any audio file — fast, private, and hardware-accelerated in your browser.
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How it works
01
Select Video File
Drag and drop or browse to choose the video you want to add audio to.
02
Select Audio File
Choose an audio file (MP3, AAC, WAV, OGG, FLAC) to combine with the video.
03
Download Combined File
Processing uses hardware-accelerated WebCodecs. Download your new video instantly.
Why add audio in your browser?
No servers, no uploads, no waiting.
No Upload Required
Your files stay on your device. Zero bytes are sent to any server.
Hardware Accelerated
Uses WebCodecs API for near-native speed — process large files in seconds.
100% Private
No data leaves your browser. Processing happens locally on your machine.
Works Offline
After the initial page load, combining works entirely without internet.
Frequently asked questions
Need to extract audio instead?
Pull the audio track from any video, or trim clips with lossless cutting.