Reduce your Lottie animation file size by up to 70%. Get instant performance scores, layer-by-layer breakdown, DOM impact prediction, and expert optimization tips.
Drag & Drop your .json Lottie file here or click to browse
Max 10MB • Your files never leave the browser • Works offline
Optimized Result
Your Lottie JSON — minified with precision rounding
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Original
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Optimized
⚡ Performance Score
—Score
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File Size
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Layers
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FPS
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Duration
▶ Animation Preview
0:00 / 0:00
📊 Layer Size Breakdown
🌳 DOM Impact Prediction
—Estimated SVG DOM Elements
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3k+
✅ Light⚠️ Medium🔴 Heavy
💡 Optimization Tips
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Frequently Asked Questions About Lottie Optimization
How do I reduce Lottie JSON file size?
Upload your file to this free optimizer — it minifies JSON, rounds decimal precision, and produces a production-ready file. For deeper optimization, simplify paths in After Effects, merge layers, remove unused assets, and consider dotLottie format for 80% more compression.
What is a good Lottie file size for web?
Under 30KB for icons, under 100KB for UI animations, under 300KB for illustrations, under 500KB for full-screen. Lottie is typically 600% smaller than GIF with better quality.
How many DOM elements does a Lottie create?
With SVG renderer: simple icons 20–50 nodes, illustrations 100–500, complex animations 1000+. High counts hurt performance — use canvas renderer for 1500+ elements.
What causes large Lottie file sizes?
Too many layers, complex paths with excessive anchors, embedded raster images, expressions not baked to keyframes, high decimal precision, 3D transforms, and unused hidden layers.
Lottie JSON vs dotLottie?
Lottie JSON is readable format. dotLottie compresses JSON + assets into ZIP, reducing size up to 80%. Both supported by lottie-web, lottie-ios, lottie-android.
Is this tool secure?
100% client-side — files processed in browser via JavaScript. Nothing uploaded to any server. Works offline too.
The Complete Guide to Lottie Animation Optimization
Lottie animations have revolutionized motion on web and mobile apps. Exported from After Effects via Bodymovin, Lottie JSON files deliver smooth, scalable animations at a fraction of GIF or video size. But unoptimized files can still cause performance issues.
Why Optimize Your Lottie Animations?
Every kilobyte matters. A 1-second load delay can reduce conversions by 20%. While Lottie is already lightweight vs GIF (600% smaller), optimization can further reduce sizes by 30–70% — faster loads, smoother playback, better Core Web Vitals.
Key Optimization Techniques
This optimizer applies JSON minification, decimal precision rounding, and identifies heaviest layers. For deeper optimization: simplify paths in Illustrator, merge layers in AE, remove hidden layers, bake expressions, and convert to dotLottie format.
Understanding DOM Impact
Lottie's SVG renderer creates DOM elements for every shape and group. Complex animations can generate thousands of nodes, impacting Lighthouse scores. This analyzer predicts DOM count so you can choose canvas rendering when needed.
