Free browser tool

Lottie JSON Validator

Check a Lottie JSON file for valid JSON syntax, animation dimensions, frame rate, and common asset issues.

Choose a file to begin.

How to use this Validated JSON converter

Choose a Lottie JSON file, let the browser process it, then preview and download the Validated JSON result. There is no account step and no server upload in this workflow.

Lottie files describe animated layers and timing in JSON. For specification-level validation, compare the result with the Lottie Animation Format documentation.

Practical notes

  • • Validation is performed locally.
  • • A valid JSON file can still contain renderer-specific features.
  • • Test the animation in your target Lottie runtime.

Frequently asked questions

Can I use this Lottie JSON to Validated JSON converter without uploading a file?

Yes. The selected file is processed in your browser and is not sent to a Mascofast upload endpoint.

What does this lottie json validator change?

It reads the Lottie JSON input and creates a Validated JSON result. The original remains unchanged, so you can retry with different source settings if needed.

How do I check the converted Validated JSON file?

Preview the result here, then open it in the browser, editor, app, or game where it will be used. Codec support, transparency, timing, and embedded assets can vary by runtime.

Need a mascot animation after conversion? Explore the Mascofast tools collection.