Lottie JSON Compressor
Compress Lottie animation JSON files online for free by removing hidden layers, unused assets, empty properties, and whitespace. Our lottie json compressor shows a per-optimization savings breakdown — so you can see exactly how much each optimization saves. Supports all Lottie players including lottie-web, lottie-react, lottie-react-native, and lottie-flutter. All processing happens in your browser. No signup required.
Lottie JSON Input
Lottie JSON files exported from After Effects, LottieFiles, or Bodymovin
Compressed Lottie Output
Read-only — copy or download the compressed output
What is a Lottie JSON file?
Lottie is an animation format exported from Adobe After Effects using the Bodymovin plugin. Lottie JSON files can be large (100 KB–5 MB) due to hidden layers left by animators, unused precomp assets, and verbose property names. This tool removes those safely without affecting the visible animation.
Why Use Our Lottie JSON Compressor?
Per-Optimization Savings Breakdown
Our lottie json compressor shows a per-optimization breakdown table — hidden layers removed, unused assets stripped, empty properties cleaned, and whitespace removed — each with exact byte savings so you know exactly where your Lottie file weight comes from.
Instant Lottie JSON Compression
Compress Lottie animation JSON files in one click — the lottie json compressor removes hidden layers, unused precomp assets, and empty properties while preserving the complete visual animation output. No After Effects or Bodymovin required.
Secure Lottie JSON Compressor Online
Your Lottie JSON files never leave your device. All hidden layer removal, asset cleanup, and JSON minification happens locally in your browser — no server upload, complete privacy for proprietary animation assets.
Lottie JSON Compressor — No Installation
Compress Lottie files directly in your browser with zero software downloads, no plugins, and no account required. Our free lottie json compressor works on any modern browser on any operating system.
Common Use Cases for Lottie JSON Compressor
Web Page Load Time Reduction
Lottie animations on landing pages and marketing sites can be 500 KB–2 MB. Use the lottie json compressor to reduce animation file size by 30–60% — directly improving LCP scores and reducing bandwidth costs for high-traffic pages.
Mobile App Bundle Size Optimization
React Native and Flutter apps that bundle Lottie animations add significant APK/IPA size. Use the lottie json compressor to strip hidden layers and unused assets before bundling — reducing app download size for users on limited data plans.
React & Vue Component Optimization
lottie-react and lottie-vue components load animation JSON at runtime. Use the lottie json compressor to pre-process animation files before committing them to your repository — reducing the JSON payload fetched on every page load.
Core Web Vitals Improvement
Large Lottie files delay Time to Interactive (TTI) and increase Total Blocking Time (TBT). Use the lottie json compressor to reduce animation file sizes and improve Core Web Vitals scores — especially important for animations above the fold.
E-Commerce Animation Optimization
Product page animations, loading spinners, and success animations on e-commerce sites are often exported with hidden design layers. Use the lottie json compressor to strip those layers and reduce animation payload for faster checkout flows.
CI/CD Pipeline Animation Processing
Add the lottie json compressor as a build step in your CI/CD pipeline to automatically compress all Lottie animations before deployment. Maintain full-quality source files in your repository while serving optimized versions in production.
Understanding Lottie JSON Compression
What is Lottie JSON Compression?
Lottie is an animation format exported from Adobe After Effects using the Bodymovin plugin. Lottie JSON files describe animations as a tree of layers, shapes, keyframes, and assets (images and precomps). Animators often leave hidden layers (used during design but invisible at runtime), unused precomp assets, and verbose property names in exported files. Our lottie json compressor parses the Lottie JSON schema, identifies and removes these unnecessary elements, and minifies the output — reducing file size by 20–60% without any visible change to the animation.
How Our Lottie JSON Compressor Works
- 1Paste or upload your Lottie JSON: Enter your Lottie animation JSON directly or upload the .json file. The lottie json compressor validates the file structure and reports animation metadata — your file never leaves your browser.
- 2Choose optimization options: Select which optimizations to apply — hidden layer removal, unused asset cleanup, empty property stripping, layer name removal, and JSON minification. Each option shows its individual byte savings in the results panel.
- 3Review per-optimization savings and download: The lottie json compressor shows a breakdown table with savings per optimization type, total reduction percentage, and animation metadata (frame rate, duration, dimensions). Copy or download the compressed JSON directly.
What Gets Compressed
- Hidden Layers (hd: true): Layers with the
hdproperty set totrueare invisible at runtime — they are design-time guides left by animators. Removing them has zero visual impact. - Unused Assets: Lottie files often contain precomp assets and image assets that are no longer referenced by any layer. The lottie json compressor traces all
refIdreferences and removes unreferenced assets. - Empty Properties: Null values, empty arrays, and undefined properties in the Lottie schema add bytes without contributing to the animation. These are safely removed.
- Layer/Asset Names (optional): The
nm,mn,cl, andlnfields store human-readable names for layers and assets — useful in After Effects but not needed by Lottie players at runtime.
Important Limitations
The lottie json compressor performs safe, non-destructive optimizations — it only removes elements that have no visual impact on the rendered animation. It does not reduce keyframe precision, simplify bezier curves, or modify shape paths. For maximum compression, combine this tool with GZIP or Brotli server compression — a 200 KB Lottie file compressed to 120 KB by this tool will further compress to ~30 KB over the wire with GZIP. Always test the compressed output in your target Lottie player before deploying to production.
Related Tools
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JSON vs MessagePack Size Comparison
Compare JSON byte size vs MessagePack encoding for any payload — shows exact savings, type-by-type breakdown, and MessagePack hex preview. Free online JSON vs MessagePack comparison.
String Decompressor (GZIP/LZ)
Decompress GZIP+Base64, DEFLATE+Base64, and LZ-String compressed payloads back to readable text — supports all three LZ-String variants. Free online string decompressor.
ZIP File Extractor
Extract files from any ZIP archive client-side — browse contents, preview text files, download individual files or all at once. Free online ZIP extractor, no signup required.
Frequently Asked Questions About Lottie JSON Compressor
A Lottie JSON compressor reduces the file size of Lottie animation JSON files by removing hidden layers, unused assets, empty properties, and whitespace — without affecting the visible animation. Our free lottie json compressor online works entirely in your browser — your file is never uploaded to any server.
No. The lottie json compressor only removes elements that have no visual impact — hidden layers (hd: true), unreferenced assets, and empty properties. The compressed output plays identically to the original in all Lottie players including lottie-web, lottie-react, lottie-react-native, and lottie-flutter. Always test in your target player before deploying.
Absolutely. Our lottie json compressor processes everything locally in your browser. Your Lottie JSON file is never uploaded to any server, never stored, and never leaves your device. This is especially important for proprietary animation assets.
Yes — 100% free, forever. No signup, no account, no premium tier, no file size limits, and no ads interrupting your workflow. Just paste your Lottie JSON, compress, and download.
Hidden layers are layers with the hd property set to true — they are invisible at runtime but are often left in exported Lottie files by animators who used them as design guides or reference layers in After Effects. Removing them has zero visual impact on the animation and can save significant file size in complex animations.
Lottie files can contain precomp assets (nested animations) and image assets that are defined in the assets array but never referenced by any layer. These are often leftover from earlier versions of the animation. The lottie json compressor traces all refId references and removes any asset not referenced by any layer.
Layer names (nm field) are useful for debugging in After Effects and Lottie player devtools, but are not needed for the animation to play correctly. Removing them is safe for production deployments and can save 5–15% file size for animations with many named layers. Keep them in development builds for easier debugging.
Savings depend on how many hidden layers and unused assets your animation contains. Simple animations with few hidden layers may see 10–20% reduction from whitespace removal alone. Complex animations exported from After Effects with many hidden guide layers and unused precomps can see 40–60% reduction.
Yes. The compressed output is fully compatible with all Lottie players — lottie-web, lottie-react, lottie-react-native, lottie-flutter, lottie-android, and lottie-ios. The lottie json compressor only removes elements that Lottie players ignore at runtime.