Zoom virtual backgrounds work best at 1920x1080 (16:9) resolution. This matches the default Zoom video resolution and ensures your background fills the screen without scaling or cropping.
For the best virtual background experience, use images without busy patterns near the edges (where Zoom's AI blending may create artifacts), with good contrast between the background and your clothing, and at the recommended 1920x1080 dimensions.
With ImgTools, upload your desired background image, crop to 16:9 if needed, and resize to 1920x1080. Save as JPEG at 85% quality.
Zoom also supports video backgrounds at 1920x1080 MP4 format, but for static backgrounds, an optimized image file works perfectly.
All processing happens locally in your browser.