Is Lottie good for performance?

Mostly, yes — Lottie replaces heavy GIFs and videos with tiny vector files, which is good for load time. But like anything that runs every frame, it can be misused. Here’s a realistic picture.

Why it’s usually fast

• Small files download quickly — kilobytes instead of megabytes.
• No layout thrash — the player draws to its own SVG/canvas surface.
• One request — a single JSON (or .lottie) versus many image frames.

When to be careful

• Too many at once. Dozens of simultaneously animating Lotties on one screen add up. Pause off-screen ones.
• Heavy effects. Large blurs and many drop shadows are the most expensive things to render.
• Huge canvases. A full-screen SVG render with thousands of points costs more than a small icon.

How to keep it smooth

• Simplify artwork. Fewer layers and points = less per-frame work. Flatten what you don’t animate when you import from your tool.
• Choose the right renderer. SVG is crisp; canvas can be faster when there are many shapes.
• Ship .lottie. The dotLottie format is ~3× smaller — see dotLottie vs Lottie JSON.
• Lazy-load and pause. Only play what’s visible; pause when scrolled away.
• Respect reduced motion. Honor prefers-reduced-motion for accessibility.

The bottom line

For UI motion — icons, loaders, illustrations — Lottie is typically the lightest option available, and lighter than GIF or video. Keep files lean and you’ll keep frame rates high. Build an optimized one in the studio.