Free CSS Loading Animations 2026 Loading animations improve perceived performance and keep users engaged during async operations. ProofMatcher's free loader library has CSS loading animations built with pure @keyframes — GPU-accelerated, no JavaScript libraries needed. Spinning Ring Loader .spinner { width: 40px; height: 40px; border: 3px solid rgba(255,255,255,0.1); border-top-color: #e53e3e; border-radius: 50%; animation: spin 0.8s linear infinite; } @keyframes spin { to { transform: rotate(36