{
  "title": "HTML to markdown",
  "human_url": "https://happytails.ai/en/text-tools/html-to-markdown/",
  "agent_url": "https://happytails.ai/agents/en/text-tools/html-to-markdown/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/text-tools/html-to-markdown.md",
  "content": "HTML to markdown\nConvert HTML markup into Markdown.\nHow to use HTML to markdown\nEnter html source in the input field.\nThe result updates as you type. Adjust the available settings if needed.\nReview the result, then use Copy result or a download link when available.\nWhat to expect\nConvert HTML markup into Markdown. Paste HTML source, not a website URL. Complex layouts and styling do not carry over into Markdown.\nTry a small example\n<p>Hello <strong>world</strong>.</p>\nUseful next steps\nMarkdown to HTML\nConvert Markdown into HTML source.\nHTML to text\nExtract readable plain text from HTML markup.\nHTML formatter\nFormat/minify with options.\nHTML minifier\nConfigurable safe whitespace/comment treatment.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Markdown to HTML Convert Markdown into HTML source.",
      "url": "https://happytails.ai/en/text-tools/markdown-to-html/"
    },
    {
      "name": "HTML to text Extract readable plain text from HTML markup.",
      "url": "https://happytails.ai/en/text-tools/html-to-text/"
    },
    {
      "name": "HTML formatter Format/minify with options.",
      "url": "https://happytails.ai/en/developer-tools/html-formatter/"
    },
    {
      "name": "HTML minifier Configurable safe whitespace/comment treatment.",
      "url": "https://happytails.ai/en/developer-tools/html-minifier/"
    }
  ],
  "tool": {
    "id": "html-to-markdown",
    "category": "text-tools",
    "built": true,
    "requirements": "Convert pasted HTML safely; define table/link/image behavior; no implicit remote fetching.",
    "implementation": {
      "fields": [],
      "experience": {
        "automatic": true,
        "single": false,
        "label": "HTML source",
        "placeholder": "<p>Hello <strong>world</strong>.</p>",
        "help": "Paste HTML markup, not a website URL. Results update as you type. Up to 1,000,000 characters.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/html-to-markdown/run",
    "api": {
      "id": "html-to-markdown",
      "name": "HTML to markdown",
      "category": "text-tools",
      "description": "Convert HTML markup into Markdown.",
      "notes": "",
      "human_path": "/en/text-tools/html-to-markdown/",
      "method": "POST",
      "endpoint": "/api/v1/tools/html-to-markdown/run",
      "schema_url": "/api/v1/tools/html-to-markdown",
      "input_schema": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "input": {
            "type": "string",
            "maxLength": 1000000,
            "default": "",
            "description": "Plain text input. File tools use files instead unless otherwise documented."
          },
          "options": {
            "type": "object",
            "additionalProperties": false,
            "properties": {}
          }
        }
      },
      "output_schema": {
        "type": "object",
        "required": [
          "tool",
          "result"
        ],
        "properties": {
          "tool": {
            "type": "string"
          },
          "result": {
            "type": "object",
            "required": [
              "text",
              "files"
            ],
            "properties": {
              "text": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "data": {
                "description": "Parsed JSON when the textual result is JSON."
              },
              "name": {
                "type": "string"
              },
              "mime": {
                "type": "string"
              },
              "files": {
                "type": "array",
                "items": {
                  "type": "object",
                  "required": [
                    "name",
                    "mime",
                    "bytes",
                    "base64"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "mime": {
                      "type": "string"
                    },
                    "bytes": {
                      "type": "integer"
                    },
                    "base64": {
                      "type": "string",
                      "contentEncoding": "base64"
                    }
                  }
                }
              }
            }
          }
        }
      },
      "processing": "Server; same transformation code as browser tools",
      "limits": {
        "request_bytes": 8388608,
        "input_characters": 1000000,
        "files_bytes": 5242880,
        "max_files": 0,
        "timeout_seconds": 12
      }
    },
    "agent_processing": "Server; same transformation code as browser tools",
    "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 to markdown\n\n- Human page: https://happytails.ai/en/text-tools/html-to-markdown/\n- Markdown: https://happytails.ai/en/text-tools/html-to-markdown.md\n- Structured JSON: https://happytails.ai/agents/en/text-tools/html-to-markdown/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `html-to-markdown` |\n| Category | text-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Automatic updates after valid input or file selection. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/html-to-markdown/run |\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. Results update as you type. Up to 1,000,000 characters.\n\nNo additional settings are declared for this tool.\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/html-to-markdown/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/html-to-markdown.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 8388608 |\n| input_characters | 1000000 |\n| files_bytes | 5242880 |\n| max_files | 0 |\n| timeout_seconds | 12 |\n\n#### Complete input schema\n\n```json\n{\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"properties\": {\n    \"input\": {\n      \"type\": \"string\",\n      \"maxLength\": 1000000,\n      \"default\": \"\",\n      \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {}\n    }\n  }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n  \"type\": \"object\",\n  \"required\": [\n    \"tool\",\n    \"result\"\n  ],\n  \"properties\": {\n    \"tool\": {\n      \"type\": \"string\"\n    },\n    \"result\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"text\",\n        \"files\"\n      ],\n      \"properties\": {\n        \"text\": {\n          \"type\": [\n            \"string\",\n            \"null\"\n          ]\n        },\n        \"data\": {\n          \"description\": \"Parsed JSON when the textual result is JSON.\"\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"mime\": {\n          \"type\": \"string\"\n        },\n        \"files\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"required\": [\n              \"name\",\n              \"mime\",\n              \"bytes\",\n              \"base64\"\n            ],\n            \"properties\": {\n              \"name\": {\n                \"type\": \"string\"\n              },\n              \"mime\": {\n                \"type\": \"string\"\n              },\n              \"bytes\": {\n                \"type\": \"integer\"\n              },\n              \"base64\": {\n                \"type\": \"string\",\n                \"contentEncoding\": \"base64\"\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n#### Recorded request and response\n\nSaved fixture from 2026-09-28T18:13:30Z. This is historical evidence, not a new validation or a guarantee for every input.\n\n```json\n{\n  \"input\": \"<p>Hello <strong>world</strong>.</p>\",\n  \"options\": {}\n}\n```\n\n```json\n{\n  \"tool\": \"html-to-markdown\",\n  \"result\": {\n    \"text\": \"Hello **world**.\",\n    \"files\": [],\n    \"name\": \"result.md\",\n    \"mime\": \"text/plain;charset=utf-8\"\n  }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\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\nConvert pasted HTML safely; define table/link/image behavior; no implicit remote fetching.\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-to-markdown\",\n  \"category\": \"text-tools\",\n  \"built\": true,\n  \"requirements\": \"Convert pasted HTML safely; define table/link/image behavior; no implicit remote fetching.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": false,\n      \"label\": \"HTML source\",\n      \"placeholder\": \"<p>Hello <strong>world</strong>.</p>\",\n      \"help\": \"Paste HTML markup, not a website URL. Results update as you type. Up to 1,000,000 characters.\",\n      \"action\": null\n    },\n    \"mode\": \"automatic\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/html-to-markdown/run\",\n  \"api\": {\n    \"id\": \"html-to-markdown\",\n    \"name\": \"HTML to markdown\",\n    \"category\": \"text-tools\",\n    \"description\": \"Convert HTML markup into Markdown.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/text-tools/html-to-markdown/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/html-to-markdown/run\",\n    \"schema_url\": \"/api/v1/tools/html-to-markdown\",\n    \"input_schema\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"input\": {\n          \"type\": \"string\",\n          \"maxLength\": 1000000,\n          \"default\": \"\",\n          \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n        },\n        \"options\": {\n          \"type\": \"object\",\n          \"additionalProperties\": false,\n          \"properties\": {}\n        }\n      }\n    },\n    \"output_schema\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"tool\",\n        \"result\"\n      ],\n      \"properties\": {\n        \"tool\": {\n          \"type\": \"string\"\n        },\n        \"result\": {\n          \"type\": \"object\",\n          \"required\": [\n            \"text\",\n            \"files\"\n          ],\n          \"properties\": {\n            \"text\": {\n              \"type\": [\n                \"string\",\n                \"null\"\n              ]\n            },\n            \"data\": {\n              \"description\": \"Parsed JSON when the textual result is JSON.\"\n            },\n            \"name\": {\n              \"type\": \"string\"\n            },\n            \"mime\": {\n              \"type\": \"string\"\n            },\n            \"files\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": \"object\",\n                \"required\": [\n                  \"name\",\n                  \"mime\",\n                  \"bytes\",\n                  \"base64\"\n                ],\n                \"properties\": {\n                  \"name\": {\n                    \"type\": \"string\"\n                  },\n                  \"mime\": {\n                    \"type\": \"string\"\n                  },\n                  \"bytes\": {\n                    \"type\": \"integer\"\n                  },\n                  \"base64\": {\n                    \"type\": \"string\",\n                    \"contentEncoding\": \"base64\"\n                  }\n                }\n              }\n            }\n          }\n        }\n      }\n    },\n    \"processing\": \"Server; same transformation code as browser tools\",\n    \"limits\": {\n      \"request_bytes\": 8388608,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 5242880,\n      \"max_files\": 0,\n      \"timeout_seconds\": 12\n    }\n  },\n  \"agent_processing\": \"Server; same transformation code as browser tools\",\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\nConvert HTML markup into Markdown.\n\n## How to use HTML to markdown\n\n1. Enter html source in the input field.\n2. The result updates as you type. Adjust the available settings if needed.\n3. Review the result, then use Copy result or a download link when available.\n\n## What to expect\n\nConvert HTML markup into Markdown. Paste HTML source, not a website URL. Complex layouts and styling do not carry over into Markdown.\n\n### Try a small example\n\n```\n<p>Hello <strong>world</strong>.</p>\n```\n\n## Useful next steps\n\n- [Markdown to HTML](https://happytails.ai/en/text-tools/markdown-to-html/): Convert Markdown into HTML source. ([Markdown](https://happytails.ai/en/text-tools/markdown-to-html.md))\n\n- [HTML to text](https://happytails.ai/en/text-tools/html-to-text/): Extract readable plain text from HTML markup. ([Markdown](https://happytails.ai/en/text-tools/html-to-text.md))\n\n- [HTML formatter](https://happytails.ai/en/developer-tools/html-formatter/): Format/minify with options. ([Markdown](https://happytails.ai/en/developer-tools/html-formatter.md))\n\n- [HTML minifier](https://happytails.ai/en/developer-tools/html-minifier/): Configurable safe whitespace/comment treatment. ([Markdown](https://happytails.ai/en/developer-tools/html-minifier.md))\n"
}