Replace Video Audio
Replace the original sound with an uploaded audio track.
How to use Replace Video Audio
Replace the original sound with an uploaded audio track.
The replacement track is looped when necessary so the new sound continues for the full video duration.
- Open the Replace Video Audio tool on Tools4U.
- Upload your video first, then an audio file.
- Set any options and select Process Video.
- Inspect the result, then download your output.
Frequently asked questions
Is Replace Video Audio free?
Yes. Verified Tools4U users can process short videos for free. Premium members do not see ads.
What videos can I upload?
Use videos you own or are authorized to edit. The current upload limit is 30 MB per file, 44 MB total, and 120 seconds per clip. Some effects and slow devices have stricter limits.
Are my videos sent to third-party platforms?
No. Uploaded video data is processed by a private FFmpeg worker on the Tools4U VPS. Temporary output jobs expire automatically; avoid uploading sensitive videos.