JSON Animation Viewer previews and inspects Lottie-style JSON files in your browser without an account. The selected JSON is parsed client-side and is not intentionally uploaded to an application server. This guide explains the available controls, analysis panels, privacy boundary, and checks still required in your target runtime.
Navigate to the JSON Animation Viewer homepage. You'll see a clean interface with a large drop zone in the center of the screen. The viewer is ready to accept your animation file right away. There's no login required and nothing to configure before you start.
You have two ways to load a Lottie JSON file into the viewer:
The .json extension alone does not prove that a file is a Lottie animation. If loading fails, check its JSON syntax and expected Lottie properties such as version, dimensions, frame range, frame rate, and layers.
Once your file loads, the animation starts playing automatically. You'll see it rendered in the viewport at its original dimensions. The file name appears above the animation so you can confirm you've loaded the correct file, which is especially helpful when you're working with multiple animation files during a project.
The web preview uses lottie-web. It is useful for visual inspection, but it does not guarantee identical output in iOS, Android, React Native, or a production container. Test every target runtime, especially files that use masks, effects, expressions, 3D layers, or external assets.
Use play, pause, direction, speed, loop mode, segment, and frame controls to inspect timing. Change the background preset, custom color, or local background image to check contrast and transparency.
The metadata panel reports composition dimensions, frame rate, frame range, duration, layer and asset counts, markers, and file size. Use these facts to plan containers and compare exports.
The layer panel exposes names, types, frame ranges, masks, effects, blend information, and hierarchy. The performance grade combines documented static signals such as layer count, expressions, masks, effects, 3D layers, embedded images, and frame rate.
Optimization suggestions and platform compatibility flags are heuristics, not runtime benchmarks or certification. Follow the linked layers, review the documented method, and confirm the findings in the target application.
The snippet panel creates starter examples for common web and mobile runtimes using the current file context. Treat them as integration starting points, then adapt asset paths, lifecycle behavior, accessibility, and error handling. To inspect another file, select or drop a new JSON file.
The selected JSON is parsed in browser memory and is not intentionally uploaded to an application server or stored in a product database. The page itself is delivered by a hosting provider, advertising code may run when enabled, and external asset references inside a file can trigger browser requests. Review the Privacy Policy and your browser's network panel before using sensitive material.
JSON Animation Viewer supports standard Lottie JSON files exported from Adobe After Effects using the Bodymovin plugin. It also works with animations created in other tools that output the Lottie JSON format, such as Haiku Animator, LottieFiles editor, and Figma plugins that export to Lottie. The file must be a valid .json file containing Lottie animation data. DotLottie (.lottie) files are not currently supported.
If you run into any issues or have questions about using the viewer, check our FAQ page for answers to common questions. You can also visit our GitHub Issues page to report bugs or request features.