Upload a video and an audio file, and mux them into one video. The video stream is copied losslessly; if the video already has audio, it is replaced.
Your file never leaves your device. All processing happens right in your browser, and nothing is uploaded to a server.
Provide a video and an audio file, and the tool muxes them into one output with the video carried over untouched. Silent screen recordings gain narration, muted clips gain music, and the picture never pays a quality price.
Record narration with the voice recorder, silence the original track with remove audio, then combine here: a complete voiceover pipeline that never leaves the browser.