{
  "title": "HTML accessibility checker",
  "human_url": "https://happytails.ai/en/accessibility-tools/html-accessibility-checker/",
  "agent_url": "https://happytails.ai/agents/en/accessibility-tools/html-accessibility-checker/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/accessibility-tools/html-accessibility-checker.md",
  "content": "HTML accessibility checker\nPaste HTML with automated rule results.\nHow to use HTML accessibility checker\nEnter html source in the input field.\nReview the settings, then choose Run HTML accessibility checker.\nReview the result, then use Copy result or a download link when available.\nWorking with html accessibility checker\nAccessibility utilities can calculate contrast, inspect markup and help draft descriptions. They answer specific questions, but a usable experience also depends on navigation, context and the way content is presented to people using different technologies.\nCommon questions\nDoes every image need a long description?\nNo. The useful description depends on the image’s purpose and nearby text. A decorative image and a chart conveying important information need different treatment.\nCan an automated pass certify the whole experience?\nNo. Automated checks cover only part of the problem. Use them to find issues, then review interactions and content with the intended users in mind.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [],
  "tool": {
    "id": "html-accessibility-checker",
    "category": "accessibility-tools",
    "built": true,
    "requirements": "Paste HTML with automated rule results; explain manual keyboard/screen-reader testing still required.",
    "implementation": {
      "fields": [],
      "experience": {
        "automatic": false,
        "single": false,
        "label": "HTML source",
        "placeholder": "<p>Hello <strong>world</strong>.</p>",
        "help": "Paste HTML markup, not a website URL. Up to 1,000,000 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"
    }
  },
  "markdown": "# HTML accessibility checker\n\n- Human page: https://happytails.ai/en/accessibility-tools/html-accessibility-checker/\n- Markdown: https://happytails.ai/en/accessibility-tools/html-accessibility-checker.md\n- Structured JSON: https://happytails.ai/agents/en/accessibility-tools/html-accessibility-checker/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `html-accessibility-checker` |\n| Category | accessibility-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | run_current_tool |\n\n### Inputs and settings\n\nText input: HTML source.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\n<p>Hello <strong>world</strong>.</p>\n```\n\nPaste HTML markup, not a website URL. Up to 1,000,000 characters. Review the settings before running.\n\nNo additional settings are declared for this tool.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nPaste HTML with automated rule results; explain manual keyboard/screen-reader testing still required.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"html-accessibility-checker\",\n  \"category\": \"accessibility-tools\",\n  \"built\": true,\n  \"requirements\": \"Paste HTML with automated rule results; explain manual keyboard/screen-reader testing still required.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"label\": \"HTML source\",\n      \"placeholder\": \"<p>Hello <strong>world</strong>.</p>\",\n      \"help\": \"Paste HTML markup, not a website URL. Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nPaste HTML with automated rule results.\n\n## How to use HTML accessibility checker\n\n1. Enter html source in the input field.\n2. Review the settings, then choose Run HTML accessibility checker.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with html accessibility checker\n\nAccessibility utilities can calculate contrast, inspect markup and help draft descriptions. They answer specific questions, but a usable experience also depends on navigation, context and the way content is presented to people using different technologies.\n\n## Common questions\n\n### Does every image need a long description?\n\nNo. The useful description depends on the image’s purpose and nearby text. A decorative image and a chart conveying important information need different treatment.\n\n### Can an automated pass certify the whole experience?\n\nNo. Automated checks cover only part of the problem. Use them to find issues, then review interactions and content with the intended users in mind.\n"
}