happytails.ai

Document Language Tag Checker

Open Document Language Tag 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": "document-language-tag-checker",
  "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": "document-language-tag-checker",
    "note": "Check HTML language and direction declarations locally. The tool does not infer language from prose.",
    "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

Find missing or inconsistent language and direction declarations in HTML. Runs locally and returns a reviewable report.

How to use Document Language Tag Checker
  1. Paste the HTML document.
  2. Run the local check.
  3. Review missing or inconsistent declarations and download the report.

Input is limited to 200000 characters. Results are computed locally and exported as JSON.

Declarations, not inference

The checker inspects explicit HTML lang and dir attributes. It does not guess a language from prose.