{
  "title": "Bold text",
  "human_url": "https://happytails.ai/en/text-tools/bold-text/",
  "agent_url": "https://happytails.ai/agents/en/text-tools/bold-text/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/text-tools/bold-text.md",
  "content": "Bold text\nTurn letters and digits into bold Unicode characters.\nHow to use Bold text\nEnter your text 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\nTurn letters and digits into bold Unicode characters. This replaces supported Latin letters and digits with mathematical Unicode symbols. It is not rich-text font formatting. Some apps, search systems and screen readers handle these characters differently.\nTry a small example\nABC\nUseful next steps\nItalic text\nTurn Latin letters into italic Unicode characters.\nUnderline text\nAdd combining underlines to non-whitespace characters.\nStrikethrough text\nAdd a strikethrough mark to visible characters.\nSmall text\nConvert supported letters into small-cap Unicode characters.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Italic text Turn Latin letters into italic Unicode characters.",
      "url": "https://happytails.ai/en/text-tools/italic-text/"
    },
    {
      "name": "Underline text Add combining underlines to non-whitespace characters.",
      "url": "https://happytails.ai/en/text-tools/underline-text/"
    },
    {
      "name": "Strikethrough text Add a strikethrough mark to visible characters.",
      "url": "https://happytails.ai/en/text-tools/strikethrough-text/"
    },
    {
      "name": "Small text Convert supported letters into small-cap Unicode characters.",
      "url": "https://happytails.ai/en/text-tools/small-text/"
    }
  ],
  "tool": {
    "id": "bold-text",
    "category": "text-tools",
    "built": true,
    "requirements": "Unicode styled characters with preview; clarify it is not font formatting and support varies.",
    "implementation": {
      "fields": [],
      "note": "Unicode styling changes the characters themselves. Font and screen-reader support varies.",
      "experience": {
        "automatic": true,
        "single": false,
        "label": "Your text",
        "placeholder": "Hello world!",
        "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/bold-text/run",
    "api": {
      "id": "bold-text",
      "name": "Bold text",
      "category": "text-tools",
      "description": "Turn letters and digits into bold Unicode characters.",
      "notes": "Unicode styling changes the characters themselves. Font and screen-reader support varies.",
      "human_path": "/en/text-tools/bold-text/",
      "method": "POST",
      "endpoint": "/api/v1/tools/bold-text/run",
      "schema_url": "/api/v1/tools/bold-text",
      "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": "# Bold text\n\n- Human page: https://happytails.ai/en/text-tools/bold-text/\n- Markdown: https://happytails.ai/en/text-tools/bold-text.md\n- Structured JSON: https://happytails.ai/agents/en/text-tools/bold-text/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `bold-text` |\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/bold-text/run |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nUnicode styling changes the characters themselves. Font and screen-reader support varies.\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nHello world!\n```\n\nChange the input or settings to update your result. 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/bold-text/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/bold-text.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 2026-09-28T18:13:48Z. This is historical evidence, not a new validation or a guarantee for every input.\n\n```json\n{\n  \"input\": \"ABC\",\n  \"options\": {}\n}\n```\n\n```json\n{\n  \"tool\": \"bold-text\",\n  \"result\": {\n    \"text\": \"𝐀𝐁𝐂\",\n    \"files\": [],\n    \"name\": \"result.txt\",\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\nUnicode styled characters with preview; clarify it is not font formatting and support varies.\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\": \"bold-text\",\n  \"category\": \"text-tools\",\n  \"built\": true,\n  \"requirements\": \"Unicode styled characters with preview; clarify it is not font formatting and support varies.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"note\": \"Unicode styling changes the characters themselves. Font and screen-reader support varies.\",\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Hello world!\",\n      \"help\": \"Change the input or settings to update your result. 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/bold-text/run\",\n  \"api\": {\n    \"id\": \"bold-text\",\n    \"name\": \"Bold text\",\n    \"category\": \"text-tools\",\n    \"description\": \"Turn letters and digits into bold Unicode characters.\",\n    \"notes\": \"Unicode styling changes the characters themselves. Font and screen-reader support varies.\",\n    \"human_path\": \"/en/text-tools/bold-text/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/bold-text/run\",\n    \"schema_url\": \"/api/v1/tools/bold-text\",\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\nTurn letters and digits into bold Unicode characters.\n\n## How to use Bold text\n\n1. Enter your text 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\nTurn letters and digits into bold Unicode characters. This replaces supported Latin letters and digits with mathematical Unicode symbols. It is not rich-text font formatting. Some apps, search systems and screen readers handle these characters differently.\n\n### Try a small example\n\n```\nABC\n```\n\n## Useful next steps\n\n- [Italic text](https://happytails.ai/en/text-tools/italic-text/): Turn Latin letters into italic Unicode characters. ([Markdown](https://happytails.ai/en/text-tools/italic-text.md))\n\n- [Underline text](https://happytails.ai/en/text-tools/underline-text/): Add combining underlines to non-whitespace characters. ([Markdown](https://happytails.ai/en/text-tools/underline-text.md))\n\n- [Strikethrough text](https://happytails.ai/en/text-tools/strikethrough-text/): Add a strikethrough mark to visible characters. ([Markdown](https://happytails.ai/en/text-tools/strikethrough-text.md))\n\n- [Small text](https://happytails.ai/en/text-tools/small-text/): Convert supported letters into small-cap Unicode characters. ([Markdown](https://happytails.ai/en/text-tools/small-text.md))\n"
}