Audio Replacer
Replace the audio track in your video with a new audio file. Keep the original video quality while swapping music, voiceover, or sound effects.
Cómo usar — Audio Replacer
Upload your video
Drag and drop any video file (MP4, WebM, MOV, AVI) or click to browse. Your video stays on your device.
Add replacement audio
Upload your new audio file — MP3, WAV, AAC, OGG, or FLAC. This will replace the existing audio track entirely.
Replace and download
Click "Replace Audio" to swap tracks. Video quality is preserved (stream copy). Download the result when done.
Preguntas Frecuentes
What audio formats can I use?
MP3, WAV, AAC, OGG, FLAC, and M4A. MP3 and AAC are the most common and compatible with all video containers.
Will video quality change?
No. The tool uses stream copy for the video track — no re-encoding. Your video quality remains pixel-perfect; only the audio track is swapped.
Can I sync audio timing?
The replacement audio starts at the beginning of the video. If audio is longer, it gets trimmed. If shorter, remaining video has silence. Pre-trim your audio for precise timing.
What formats are supported?
Video: MP4, WebM, MOV, AVI. Audio: MP3, WAV, AAC, OGG, FLAC, M4A. All processing happens in your browser.