Reduced Motion Preview Checker
Open Reduced Motion Preview Checker on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.
Tool capabilities
{
"id": "reduced-motion-preview",
"category": "accessibility-tools",
"built": true,
"requirements": "Input is limited to 200000 characters. Results are computed locally and exported as JSON.",
"implementation": {
"fields": [],
"inputMaxLength": 200000,
"inputErrorCode": "STRUCTURED_TEXT_TOO_LONG",
"registrationFamily": "reduced-motion-preview",
"note": "Check CSS for a prefers-reduced-motion reduction path locally.",
"experience": {
"automatic": false,
"single": false,
"inputMaxLength": 200000,
"inputMode": "text",
"label": "Your text",
"placeholder": "Type or paste your input…",
"help": "Up to 200,000 characters. Review the settings before running.",
"helpParts": [
"Up to 200,000 characters.",
"Review the settings before running."
],
"action": null
},
"mode": "explicit",
"interactive": false
},
"execution": "Browser interface",
"api": null,
"browser_agent": {
"supported": true,
"name": "run_current_tool",
"discovery": "WebMCP on the human page in a supporting browser",
"verification": "See audit/API-AUDIT.md; availability is not verification"
}
}Page guide
Check CSS for a prefers-reduced-motion path when motion is present. Runs locally and returns a reviewable report.
How to use Reduced Motion Preview Checker
- Paste the CSS rules.
- Run the local check.
- Review motion coverage and download the report.
Input is limited to 200000 characters. Results are computed locally and exported as JSON.
Presence check
The checker finds a reduction path. Confirm the resulting experience in a browser with reduced motion enabled.