UD5 Toolkit
Shipping Box Size Optimizer - Online Fit Items into Carton
Enter item dimensions and find the smallest rectangular box that can fit them (simple packing heuristic). Helps reduce shipping costs. Local algorithm.
Tag: CSS Box Model Inspector
3+ toolsMoving Box Calculator - Online Estimate How Many Boxes You Need
Enter number of rooms and get an estimate of how many moving boxes in each size you'll need. Plan your move efficiently. Local tool.
CSS Aspect Ratio Box Generator - Online Intrinsic Size
Create a responsive box that maintains a specific aspect ratio using the aspect‑ratio property. Copy the simple CSS.