TOOL COLLECTION
Design & Display Tools
Calculate common display values such as image ratios, CSS units, and color contrast.
FREE ONLINE TOOLS
Tools ready to use
4 tools
Design
Aspect Ratio Calculator
Reduce width and height to a simple ratio, or calculate the missing dimension from a target ratio.
Open tool→Design
Image Compressor to Target KB
Compress a JPG, PNG, or WebP toward a 100 KB, 200 KB, or custom limit without uploading the image.
Open tool→Design
px to rem Converter
Convert CSS values both ways between px and rem using a configurable root font size.
Open tool→Design
Color Contrast Checker
Calculate the WCAG contrast ratio and show AA/AAA text plus AA graphics and UI results.
Open tool→