IconVault's Easing Visualizer lets you design CSS easing curves by hand instead of guessing numbers. Drag the two cubic-bezier handles on the curve editor, or start from built-in presets like ease-in, ease-out, ease-in-out and springy custom curves, and watch an animated dot race your easing against linear motion so you can feel the difference instantly.

The tool outputs ready-to-paste CSS (cubic-bezier values and transition or animation snippets) with one click. Everything runs 100% in your browser: no installs, no account, no uploads. It is a fast way for developers and designers to craft motion that feels right for buttons, modals and page transitions. Visitors get 5 free copies with no signup; IconVault Pro ($12/year) unlocks unlimited use of every tool.