lottie
    Comparison Guide

    Lottie vs CSS Animation: When to Use Each

    CSS animations are free, fast, and native. Lottie handles complexity that CSS can't. This guide helps you choose the right tool for every motion design scenario.

    Feature-by-Feature Comparison

    Feature
    Lottie
    CSS Animation
    Winner
    Animation Complexity
    Complex timelines, character animation, morphing
    Transitions, keyframes, simple transforms
    Lottie
    File Size Impact
    10-100 KB JSON + ~50 KB player
    0 KB extra — built into browsers
    CSS
    Design Workflow
    After Effects → Bodymovin export
    Hand-coded or Figma CSS export
    Lottie
    Performance
    Canvas renderer for heavy animations
    GPU-composited transforms (very fast)
    CSS
    Interactivity
    Programmatic play/pause/scrub/events
    Hover/focus/active state triggers
    Lottie
    Runtime Dependency
    Requires lottie-web library
    Zero dependency — native CSS
    CSS
    Easing Control
    Custom bezier curves per property
    cubic-bezier(), steps(), spring()
    Tie
    Responsive Behavior
    Scales via container, needs config
    Naturally responsive with relative units
    CSS
    Maintainability
    JSON file — regenerate from design tool
    Code-based — version controlled
    Tie
    Color/Gradient Animation
    Full support, designer-controlled
    Limited gradient animation support
    Lottie
    Path Animation
    Shape morphing, trim paths
    stroke-dasharray/offset only
    Lottie
    Learning Curve
    Designers animate, devs integrate
    Devs need to learn animation properties
    Lottie

    Scenario-Based Recommendations

    Button hover effect

    Lottie: Overkill (8 KB + player)

    CSS: ~0 KB (2 lines CSS)

    Verdict: CSS

    Loading spinner

    Lottie: 4 KB JSON

    CSS: ~0 KB (CSS keyframes)

    Verdict: CSS

    Page transition

    Lottie: 12 KB JSON

    CSS: ~0 KB (CSS + JS triggers)

    Verdict: Depends on complexity

    Onboarding illustration

    Lottie: 45 KB JSON

    CSS: Impractical to replicate

    Verdict: Lottie

    Animated mascot/character

    Lottie: 80 KB JSON

    CSS: Not feasible in CSS

    Verdict: Lottie

    Scroll-triggered reveal

    Lottie: 15 KB + scroll library

    CSS: ~0 KB + Intersection Observer

    Verdict: CSS for simple, Lottie for complex

    Decision Framework

    Choose Lottie When

    • Animations come from After Effects or design tools
    • Motion involves illustrations, characters, or complex shapes
    • You need runtime playback control (play, pause, seek)
    • Multiple properties animate along complex timelines
    • Path morphing or trim path effects are needed
    • The same animation must work on web, iOS, and Android

    Choose CSS Animation When

    • Animations are UI micro-interactions (hover, focus, toggle)
    • Performance budget is extremely tight
    • No additional JavaScript libraries are acceptable
    • Motion maps cleanly to transform/opacity changes
    • Responsive behavior with relative units is needed
    • The animation is simple enough to describe in a few keyframes

    The Best Practice: Use Both

    The most performant production apps combine both approaches. Use CSS for UI state transitions (button hovers, page fades, skeleton loading) and Lottie for rich, illustrative motion (onboarding flows, success celebrations, empty states). This gives you zero-dependency performance where it matters and design-fidelity animation where it shines.