Video and audio on separate upload tracks
When footage and sound come from different exports, keep them on separate tracks. Order each side, then mux into one MP4 or WebM without opening a desktop NLE.
EnglishENFree Video and Audio Merger Online
Upload video clips and audio clips on separate tracks, order each side, and export one MP4 or WebM file. Free online video and audio merger — no install needed.
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How to Merge Video and Audio Online
01Upload video and audio tracks
Add video clips to the video track and audio clips to the audio track. Mixed formats on each side are fine.
02Order clips and pick an export format
Arrange files in the order you want them combined. Choose MP4 or WebM before you merge.
03Merge, preview, and download
Processing runs in your browser with ffmpeg.wasm. Preview the combined file, then sign in to download.
Why Use Our Free Video and Audio Merger Online
Pair narration with screen recordings, music with B-roll, or voice with silent footage — separate tracks, one browser export.
Built for narration, B-roll, and music beds
Drop a screen recording on the video track and a voiceover on the audio track, or stack interview audio under visual cutaways. Each track concatenates in order before export.
Preview the mux before you download
Watch the combined result on the page while ffmpeg.wasm runs locally. Sign in to save when lip-sync and levels look right.
Frequently Asked Questions
It combines video footage with a separate audio track into one file. Upload clips to each track, set the order, and export MP4 or WebM.
Add video files to the video track and audio files to the audio track, arrange each side, pick MP4 or WebM, and click Merge.
Yes. The merger concatenates each track in order, then combines them into one export.
Video uploads include MP4, MOV, WebM, and MKV. Audio uploads include MP3, WAV, M4A, and OGG. Export as MP4 or WebM.
In Video+audio tracks mode, the export uses your uploaded audio combined with the video track. Upload only the audio you want in the final file.
No. Upload, order, merge, preview, and download in the browser without installing desktop tools.
Discover More Tools on VMEG
Extract audio, trim clips, generate subtitles, and translate videos — more free tools on VMEG.
Need lip-sync dubbing after you merge tracks?
Replace or translate the audio bed with AI voiceovers that match your merged video on VMEG.