Skip to content

Lottie Inspector

Inspect Lottie file structure, runtime stats, and delivery warnings before shipping an animation.

Last reviewed: June 11, 2026

About this tool

Inspect Lottie JSON before handing it to engineering or shipping it in a landing page. Check size, layer complexity, and asset usage from one screen.

Lottie Inspector is useful when teams need more than simple playback and want to inspect the structure of an animation asset. It helps with debugging layers, assets, markers, and metadata before the file moves deeper into product or motion workflows.

  • Shows canvas size, duration, frame rate, layer count, and asset count.
  • Flags common delivery risks like image-heavy animations and long durations.
  • Useful for design QA and developer handoff.

How to use Lottie Inspector

Load the Lottie JSON, review the structural details, and use the inspector output to confirm the file matches your implementation or optimization expectations. If the animation behaves unexpectedly in production, compare the inspector results with the working reference file so you can spot structural drift faster.

When this tool is useful

  • Shows canvas size, duration, frame rate, layer count, and asset count.
  • Flags common delivery risks like image-heavy animations and long durations.
  • Useful for design QA and developer handoff.

Practical tips

    Examples you can test

    These examples show the kind of real input and reviewed output this tool is designed to support. Use them as a starting point before pasting your own production content, then compare the output with the destination system that will use the result. The goal is not only to produce a value, but to make the input assumptions, output format, and review step clear enough that the result can be trusted in a real workflow.

    Inspect animation metadata

    Example input

    Lottie JSON with 120 frames at 60 fps

    Expected output

    Duration, frame rate, dimensions, and layer summary

    Metadata helps confirm whether an animation fits the intended UI slot and playback duration.

    Review layer complexity

    Example input

    Lottie file with many shape layers

    Expected output

    Layer and asset counts for performance review

    Complex animations can affect rendering performance, especially on lower-powered devices.

    Validation checklist

    Run through these checks before copying the result into a CMS, codebase, spreadsheet, campaign, support ticket, or production document. Small formatting differences, unit assumptions, hidden whitespace, and platform-specific rules are common sources of mistakes in quick browser tools, so the final review should happen in the same context where the output will be used.

    • Check dimensions, frame rate, and duration before shipping an animation.
    • Review file size and layer count when performance matters.
    • Preview the animation in the target app or browser context before publishing.

    Why people use this tool

    People search for Lottie inspection tools when they are troubleshooting or auditing animation assets, not just previewing them. The page is strongest when it makes internal structure readable enough for developers and designers to diagnose issues together.

    Related search intents

    lottie inspector, inspect lottie json, lottie asset details, debug lottie animation, lottie structure viewer.

    Frequently asked questions

    Does this preview the animation?

    This tool focuses on inspection and warnings rather than playback controls. Use the Lottie Preview tool when you want interactive playback.

    Can it catch heavy Lottie files?

    Yes. It surfaces simple warnings around image assets, long duration, and high layer counts.

    What file types does the Lottie Inspector accept?

    The inspector accepts standard Lottie JSON files as well as dotLottie (.lottie) container files. Paste the raw JSON or upload the file to begin inspection.

    What kinds of delivery warnings does the inspector flag?

    It warns about oversized asset payloads, excessive layer counts, embedded raster images that inflate file size, and expressions that may not render consistently across all Lottie player libraries.

    Does the inspector show the animation's actual frame rate and duration?

    Yes. The runtime stats panel displays the frame rate (fr), total frames (op minus ip), calculated duration in seconds, and the overall file size so you can assess performance impact.

    Review and privacy notes

    Utiloom reviews tool pages for practical examples, validation checks, browser-side processing notes, and clear limitations before they are promoted in search. Read more about the editorial approach on the About page, check data handling in the Privacy Policy, or contact us if a tool needs correction.

    Related tools

    Keep the workflow moving

    These tools are the closest next steps based on category, keyword overlap, and popular workflow paths.

    Image

    Lottie Preview

    Preview Lottie animations with playback controls.

    Browser tool
    Image

    Lottie Color Editor

    Edit Lottie colors without touching raw keyframes.

    Browser tool
    Image

    App Icon Resizer

    Generate Android and iOS app icon sizes.

    Browser tool
    Image

    Favicon Generator

    Create a complete favicon set and embed snippet.

    Browser tool