📖 How to use
- Choose a supported video file.
- Adjust the available output options.
- Start processing.
- Download the finished result when available.
Add Audio to Video
Replace or add an audio track to a video and export MP4.
◉ 100% Free
⚡ Instant Results
◈ Browser Tool
✨ Choose Video & Process
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Add Audio to Video
Replace or add an audio track to a video and export MP4.
How to Use Add Audio to Video
Process your video in four simple steps.
1. Choose Video
Select a supported video file from your device.
2. Set Options
Choose the settings needed for this tool.
3. Process
The browser video engine processes your file locally.
4. Download
Save the finished file to your device.
Why Use This Tool?
Replace or add an audio track to a video and export MP4. The core processing is designed to happen in your browser, so large files can take longer on slower devices.
About Add Audio to Video
Replace or add an audio track to a video and export MP4.
Frequently Asked Questions
Is this tool free?
Yes, this browser-based tool is free to use.
Are my videos uploaded?
The core conversion is designed to run locally in your browser with WebAssembly.
Why can processing take time?
Video conversion is CPU and memory intensive, especially for large or high-resolution files.
📁 Simple input workflow
⚡ Fast processing
⬇ Clear result/output
⚡ Features
- Simple video-processing workspace.
- Clear input and output controls.
- Progress/result area where supported.
- Free browser tool.
💡 Pro Tips
- Use supported input formats.
- Large files may take longer to process.
- Keep the original video as a backup.
- Check output settings before starting.