Transparency: BMP (24-bit) has no alpha channel. The image is flattened onto the chosen background color.
Sizing: Set width or height (or both). If one is blank, it�s computed from the aspect ratio. Scale multiplies intrinsic size when width/height are blank.
File size: BMP is uncompressed; expect larger files than WEBP/PNG/JPEG.
Privacy: Everything happens locally in your browser�no uploads.
Compatibility: Most modern browsers decode WEBP; very old browsers may not.
How sizes are chosen
Intrinsic size is the image�s native pixel size.
If width & height are both set, those are used exactly.
If only one is set, the other is computed by aspect ratio.
If neither is set, intrinsic size � scale is used.