Explore Other Categories

Discover tools from different categories to expand your toolkit beyond Sysops.

Calculate the number of weeks between dates or add/subtract weeks from a date. Simple, free online week calculator.

Calculate volume and surface area for cubes, spheres, cylinders, cones, and pyramids

Test and debug regular expressions in real-time with visual feedback, match highlighting, and capture group analysis.

Scan and decode QR codes from images. Free online QR code reader that works with uploaded images.