Lottie is an open-source animation file format created by Airbnb. It uses JSON to describe vector animations, making them lightweight, scalable, and interactive. Lottie animations are widely used in web and mobile apps because they render natively and maintain crisp quality at any screen size. The format is based on Adobe After Effects animations exported via the Bodymovin plugin.

You can export Lottie JSON files from Adobe After Effects using the Bodymovin plugin. Additionally, you can find thousands of free and premium Lottie animations on LottieFiles.com, which is the largest community for Lottie animations. Designers can also create Lottie animations in tools like Figma, Sketch, and Haiku Animator.

Lottie animations are significantly smaller in file size compared to GIFs or videos—often 5-10x smaller. They are resolution-independent vector graphics, meaning they look sharp on Retina and high-DPI screens. Lottie files support interactivity, can be manipulated programmatically (play, pause, change colors, etc.), and support transparency natively without the heavy file size of alpha-channel videos.

Common issues include: the JSON file may reference external image assets that aren't accessible (use self-contained JSON when possible), the Lottie version may use features not supported by the web player (check your export settings), the JSON might be malformed (validate it with a JSON linter), or the animation may rely on expressions that aren't fully supported by the Lottie web renderer. Try re-exporting from After Effects with "Skip expression evaluation" checked if you encounter issues.

Yes, Lottie JSON is human-readable and editable. You can modify colors, adjust timing, remove layers, or change animation properties directly in the JSON. Use this tool's built-in JSON editor to make changes and preview them instantly. For advanced editing, consider using the LottieFiles Editor or the Lottie Web Editor. Always keep a backup of the original file before editing.

Lottie-web (the JavaScript renderer used by this tool) supports all modern browsers including Chrome, Firefox, Safari, and Edge. It falls back to canvas rendering when SVG rendering is not optimal. On mobile devices, Lottie animations perform well on both iOS and Android. The library is used in production by companies like Airbnb, Google, Netflix, and Spotify.

You can use the lottie-web JavaScript library (CDN: cdnjs.cloudflare.com/ajax/libs/lottie-web) or the @lottiefiles/lottie-player web component. Simply include the library, target a DOM element, and call lottie.loadAnimation() with your JSON data or URL. You can control playback, loop, speed, and direction programmatically. For React, Vue, or Angular, there are dedicated wrapper libraries available.

This online previewer can handle Lottie JSON files up to approximately 10MB comfortably. However, for optimal web performance, it's recommended to keep Lottie files under 500KB. You can optimize your animations by simplifying shapes, reducing keyframes, removing unused layers, and using the "compress" option when exporting from Bodymovin. LottieFiles also offers automatic optimization tools.