What does Blurred Video Background Maker do?
Adapt portrait, square, or narrow footage to 16:9, 9:16, 1:1, or a custom canvas by placing the source over a blurred duplicate background. Adjust foreground scale and position plus background blur, brightness, saturation, and zoom—or choose a solid color—then render locally without AI segmentation.
How to use Blurred Video Background Maker
- 1Choose a local video.
- 2Select 16:9, 9:16, 1:1, or custom dimensions.
- 3Position and scale the foreground, then adjust blur or choose a solid background.
- 4Choose audio, quality, and format settings and render locally.
Supported inputs and outputs
Inputs
MP4, MOV, WebM, MKV when decodable
Outputs
MP4 (H.264/AAC), WebM (VP9/Opus)
Practical uses
- Placing portrait video in a landscape upload
- Filling side bars behind phone footage
- Adapting square clips
- Creating consistent interview framing
Browser and media limitations
- This duplicates and blurs the full frame; it does not remove subjects from backgrounds.
- Blurred export requires full re-encoding.
- High-resolution processing is CPU and memory intensive.
- Codec playback differs across browsers.
How local processing works
Processing uses FFmpeg.wasm locally in this browser. The media engine downloads on first use, but the selected media and result are not uploaded to Tubelexity or a processing server.
Frequently asked questions
How do I add a blurred background to vertical video?
Choose a wider canvas, position the foreground, and adjust the blurred duplicate behind it.
Does this tool remove the original background?
No. It does not use AI segmentation; it layers the whole source frame.
Can I use a solid background instead?
Yes. Enable solid background and choose a color.
Can the original audio be kept?
Yes, or it can be removed before export.
Is the video uploaded?
No. FFmpeg.wasm renders it locally.