Video Background Blur

How to add a blurred background to a video

To add a blurred fill, upload one video and pick the target canvas, portrait, square, or landscape, that matches where the clip will be posted. The tool places your original frame in the center and fills the surrounding space with a blurred, enlarged copy of the same video, then exports a new MP4 at the chosen size.

You control the blur strength, so the background can be a subtle soft fill or a heavier blur that pushes focus onto the centered clip. The audio track from the source video is preserved on export, so the result is ready to post as-is.

All processing happens locally in your browser. The video you upload never leaves your device, which keeps unpublished or client footage private.

• Fitting a landscape clip into a vertical story or reel
• Posting a portrait video to a square feed without black bars
• Giving product clips a clean filled frame for storefronts
• Avoiding hard crops when aspect ratios do not match

Blurred fill versus hard cropping

Blurred background fill is a practical alternative to hard cropping when the source aspect ratio does not match the destination. Instead of cutting off part of the frame to fit a vertical or square slot, the blurred fill keeps the whole original frame visible and fills the empty space attractively.

Note that this is a fill effect, not subject segmentation. Video Background Blur creates a blurred copy of the frame behind your clip, it does not use AI to isolate a person from the background. For a clean filled frame on social or storefront placements, that fill approach is usually exactly what you want.