happytails.ai

HTML Accessibility Checker

Open HTML Accessibility 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": "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,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "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.",
      "helpParts": [
        "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"
  }
}

Page guide

Find missing image descriptions and labels in pasted HTML.

How to use HTML accessibility checker
  1. Enter html source in the input field.
  2. Review the settings, then choose Run HTML accessibility checker.
  3. Review the result, then use Copy result or a download link when available.

Working with html accessibility checker

Accessibility 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.

Common questions

Does every image need a long description?

No. The useful description depends on the image’s purpose and nearby text. A decorative image and a chart conveying important information need different treatment.

Can an automated pass certify the whole experience?

No. Automated checks cover only part of the problem. Use them to find issues, then review interactions and content with the intended users in mind.