{
  "title": "HTML formatter",
  "human_url": "https://happytails.ai/en/developer-tools/html-formatter/",
  "agent_url": "https://happytails.ai/agents/en/developer-tools/html-formatter/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/developer-tools/html-formatter.md",
  "content": "HTML formatter\nFormat/minify with options.\nHow to use HTML formatter\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.\nWorking with html formatter\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\nCommon questions\nDoes valid JSON mean the data is correct?\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\nIs decoding the same as decrypting or verifying?\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\nUseful next steps\nMarkdown to HTML\nConvert Markdown into HTML source.\nHTML to markdown\nConvert HTML markup into Markdown.\nHTML to text\nExtract readable plain text from HTML markup.\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 markdown Convert HTML markup into Markdown.",
      "url": "https://happytails.ai/en/text-tools/html-to-markdown/"
    },
    {
      "name": "HTML to text Extract readable plain text from HTML markup.",
      "url": "https://happytails.ai/en/text-tools/html-to-text/"
    },
    {
      "name": "HTML minifier Configurable safe whitespace/comment treatment.",
      "url": "https://happytails.ai/en/developer-tools/html-minifier/"
    }
  ],
  "tool": {
    "id": "html-formatter",
    "category": "developer-tools",
    "built": true,
    "requirements": "Format/minify with options; preserve preformatted text and template syntax scope.",
    "implementation": {
      "fields": [],
      "note": "Formatting parses your source; it does not execute it.",
      "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-formatter/run",
    "api": {
      "id": "html-formatter",
      "name": "HTML formatter",
      "category": "developer-tools",
      "description": "Format/minify with options.",
      "notes": "Formatting parses your source; it does not execute it.",
      "human_path": "/en/developer-tools/html-formatter/",
      "method": "POST",
      "endpoint": "/api/v1/tools/html-formatter/run",
      "schema_url": "/api/v1/tools/html-formatter",
      "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 formatter\n\n- Human page: https://happytails.ai/en/developer-tools/html-formatter/\n- Markdown: https://happytails.ai/en/developer-tools/html-formatter.md\n- Structured JSON: https://happytails.ai/agents/en/developer-tools/html-formatter/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `html-formatter` |\n| Category | developer-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-formatter/run |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nFormatting parses your source; it does not execute it.\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-formatter/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/html-formatter.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#### 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\nFormat/minify with options; preserve preformatted text and template syntax scope.\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-formatter\",\n  \"category\": \"developer-tools\",\n  \"built\": true,\n  \"requirements\": \"Format/minify with options; preserve preformatted text and template syntax scope.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"note\": \"Formatting parses your source; it does not execute it.\",\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-formatter/run\",\n  \"api\": {\n    \"id\": \"html-formatter\",\n    \"name\": \"HTML formatter\",\n    \"category\": \"developer-tools\",\n    \"description\": \"Format/minify with options.\",\n    \"notes\": \"Formatting parses your source; it does not execute it.\",\n    \"human_path\": \"/en/developer-tools/html-formatter/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/html-formatter/run\",\n    \"schema_url\": \"/api/v1/tools/html-formatter\",\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\nFormat/minify with options.\n\n## How to use HTML formatter\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## Working with html formatter\n\nFormatting makes existing data or code easier to read. Validation checks whether it follows a syntax or schema. Conversion maps it into another representation. Choosing the right operation helps avoid treating a neatly formatted result as proof that the underlying data is correct.\n\n## Common questions\n\n### Does valid JSON mean the data is correct?\n\nSyntax validation only establishes that the text can be parsed as JSON. A schema can check required fields and types, but neither proves that an email address, price or external record is factually correct.\n\n### Is decoding the same as decrypting or verifying?\n\nNo. Base64 and URL encoding are representations, not encryption. Reading a token payload does not verify its signature. Use the specific validation or verification process required by the system receiving the result.\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 markdown](https://happytails.ai/en/text-tools/html-to-markdown/): Convert HTML markup into Markdown. ([Markdown](https://happytails.ai/en/text-tools/html-to-markdown.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 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"
}