Can I add MP3 audio to a video?
Yes, where the video and audio codecs are supported by the browser processing engine.
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Add Sound to Video
Add or replace sound for a video.
1
Upload
2
Configure
3
Convert
4
Download
Add or replace sound for a video.
Video file
Choose a file to get started
Drag and drop a supported file here, or press Enter to browse your device.
Audio file
Choose a file to get started
Drag and drop a supported file here, or press Enter to browse your device.
Related tools
Ready tools are shown first.
Tool guide
Add Sound to Video Online
Add or replace audio in a video file using browser-side processing where supported. This is useful for pairing a clip with music, narration, or a cleaner audio track.
Steps
How it works
- Upload a video file.
- Choose the audio file to add or replace.
- Process the video with the selected sound.
- Preview and download the new video output.
Highlights
Key features
- Combines video with a selected audio track where codecs are supported.
- Shows file details before processing.
- Provides a real downloadable output after export.
- Useful for simple audio replacement workflows.
Use cases
Common uses
- Add background music to a clip.
- Replace noisy audio with a cleaner track.
- Create a simple narrated video.
Notes
Limitations to know
- Video and audio codec support can vary.
- Long files may take longer to process.
- Precise mixing and advanced audio editing are not included.
FAQ
3 answersFrequently asked questions
Does this mix multiple audio tracks?
The tool is intended for adding or replacing a sound track, not advanced multi-track mixing.
Why did export fail?
The input files may use unsupported codecs, be too large, or exceed browser memory limits.