OrbConvert converts your image files online. Amongst many others, we support PNG, JPG, JPEG, WEBP, GIF, SVG and TIFF. You can use the options to control image resolution, quality and file size.
From
X BitMap
A plain-text image format that stores a bitmap as a C source array, historically for X11 cursors and icons. One bit per pixel, so it is black and white only.
All XBM conversionsTo
Flexible Image Transport System
The standard format of astronomy, carrying scientific data alongside the image. Files are typically far larger than the same picture as PNG.
All FITS conversions