Validate Lottie Animations

• Masks & mattes — flags alpha matte and mask usage with platform support notes.
• Merge paths — warns about merge path compatibility on iOS and Android.
• Blur & effects — identifies layer blur and effect usage.
• Gradients — checks gradient fill and stroke support per platform.
• Expressions — flags expression usage (not supported on all players).
• Images — detects embedded image assets and their size impact.
• 3D layers — warns about 3D layer usage.
• Missing fonts — identifies text layers with missing or non-system fonts.
• Complexity metrics — layer count, keyframe count, path complexity, dimensions, frame rate, and duration.

The compatibility report analyzes your animation separately for Web (lottie-web), iOS (lottie-ios), and Android (lottie-android). Each platform gets its own honest assessment — the report never claims perfect parity. It tells you what works, what might not, and what to test.

Lottie animations that look perfect in After Effects may not render identically on every platform. Masks, mattes, merge paths, and expressions have varying support across lottie-web, lottie-ios, and lottie-android. Validating before you ship prevents production surprises.

Can the validator guarantee my animation will work on every platform?

No. The compatibility report is heuristic and cannot guarantee platform parity. It flags known risk areas so you can test on your target platforms. Always test on real devices.

Does the validator upload my file?

No. All analysis runs locally in your browser via a Web Worker. Your file never leaves your device.

What does the compatibility report check?

It checks masks, mattes, merge paths, blur, gradients, images, expressions, 3D layers, layer/keyframe counts, path complexity, dimensions, frame rate, duration, and missing fonts — separately for web, iOS, and Android.