Button Forge is a free CSS button generator that runs in your browser with no install. Adjust padding, text, color, border, shadow, hover, and animation in the edit panel on the left, and the preview in the center updates instantly.
The HTML, CSS, and JS are generated in the panels on the right and can be pasted as is with the copy button. Reset sits at the bottom of the edit panel.
Double-click a panel title to switch how the panels are laid out. In the movable layout you drag panels wherever you like and keep several open at once; in the fixed layout a single panel sits in the top right. Use the panel names in the top right to show or hide each panel.