bmp

best image quality, large file

To get best image quality, you should choose BMP file format(Windows Bitmap). It's used internally in the Microsoft Windows operating system to handle graphics images. These files are typically not compressed, resulting in large file.

BMP is a standard Windows image format on DOS and Windows-compatible computers. BMP format supports RGB, Indexed Color, Grayscale, and Bitmap color modes. You can specify either Windows or OS/2® format and a bit depth of 8 bits/channel. For 4-bit and 8-bit images using Windows format, you can also specify RLE compression.