{
  "title": "Snake case",
  "human_url": "https://happytails.ai/en/text-tools/snake-case/",
  "agent_url": "https://happytails.ai/agents/en/text-tools/snake-case/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/text-tools/snake-case.md",
  "content": "Snake case\nJoin lowercase words_with_underscores.\n⌑   Runs on your device\nHow to use this tool\nPaste your text, choose a case and copy the result. The original input stays in place so you can try another format.\nLetter case and identifiers\nLetter case uses English locale rules. Identifier modes split spaces, punctuation and existing case boundaries, then join the words. Accented letters are preserved; punctuation is removed.\nHow to use Snake case\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\nJoin lowercase words_with_underscores. Spaces and punctuation become word boundaries, then words are joined with underscores. Existing camelCase boundaries are recognized. The result is not checked against a programming-language identifier rule.\nTry a small example\nHello world\nUseful next steps\nSlug generator\nCreate a lowercase, hyphen-separated slug.\nKebab case\nJoin lowercase words-with-hyphens.\nCamel case\nTurn words into a camelCase identifier.\nPascal case\nTurn words into a PascalCase identifier.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Slug generator Create a lowercase, hyphen-separated slug.",
      "url": "https://happytails.ai/en/text-tools/slug-generator/"
    },
    {
      "name": "Kebab case Join lowercase words-with-hyphens.",
      "url": "https://happytails.ai/en/text-tools/kebab-case/"
    },
    {
      "name": "Camel case Turn words into a camelCase identifier.",
      "url": "https://happytails.ai/en/text-tools/camel-case/"
    },
    {
      "name": "Pascal case Turn words into a PascalCase identifier.",
      "url": "https://happytails.ai/en/text-tools/pascal-case/"
    }
  ],
  "tool": {
    "id": "snake-case",
    "category": "text-tools",
    "built": true,
    "requirements": "Underscore identifiers; recognize mixed-case boundaries and acronym groups.",
    "implementation": {
      "fields": [],
      "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/snake-case/run",
    "api": {
      "id": "snake-case",
      "name": "Snake case",
      "category": "text-tools",
      "description": "Join lowercase words_with_underscores.",
      "notes": "",
      "human_path": "/en/text-tools/snake-case/",
      "method": "POST",
      "endpoint": "/api/v1/tools/snake-case/run",
      "schema_url": "/api/v1/tools/snake-case",
      "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": "transform_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Snake case\n\n- Human page: https://happytails.ai/en/text-tools/snake-case/\n- Markdown: https://happytails.ai/en/text-tools/snake-case.md\n- Structured JSON: https://happytails.ai/agents/en/text-tools/snake-case/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `snake-case` |\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/snake-case/run |\n| Browser-agent interface | transform_current_tool |\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/snake-case/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/snake-case.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 2026-09-28T18:13:46Z. This is historical evidence, not a new validation or a guarantee for every input.\n\n```json\n{\n  \"input\": \"Hello world\",\n  \"options\": {}\n}\n```\n\n```json\n{\n  \"tool\": \"snake-case\",\n  \"result\": {\n    \"text\": \"hello_world\",\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 `transform_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\nUnderscore identifiers; recognize mixed-case boundaries and acronym groups.\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\": \"snake-case\",\n  \"category\": \"text-tools\",\n  \"built\": true,\n  \"requirements\": \"Underscore identifiers; recognize mixed-case boundaries and acronym groups.\",\n  \"implementation\": {\n    \"fields\": [],\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/snake-case/run\",\n  \"api\": {\n    \"id\": \"snake-case\",\n    \"name\": \"Snake case\",\n    \"category\": \"text-tools\",\n    \"description\": \"Join lowercase words_with_underscores.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/text-tools/snake-case/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/snake-case/run\",\n    \"schema_url\": \"/api/v1/tools/snake-case\",\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\": \"transform_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\nJoin lowercase words\\_with\\_underscores.\n\n⌑   Runs on your device\n\n## How to use this tool\n\nPaste your text, choose a case and copy the result. The original input stays in place so you can try another format.\n\n## Letter case and identifiers\n\nLetter case uses English locale rules. Identifier modes split spaces, punctuation and existing case boundaries, then join the words. Accented letters are preserved; punctuation is removed.\n\n## How to use Snake case\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\nJoin lowercase words\\_with\\_underscores. Spaces and punctuation become word boundaries, then words are joined with underscores. Existing camelCase boundaries are recognized. The result is not checked against a programming-language identifier rule.\n\n### Try a small example\n\n```\nHello world\n```\n\n## Useful next steps\n\n- [Slug generator](https://happytails.ai/en/text-tools/slug-generator/): Create a lowercase, hyphen-separated slug. ([Markdown](https://happytails.ai/en/text-tools/slug-generator.md))\n\n- [Kebab case](https://happytails.ai/en/text-tools/kebab-case/): Join lowercase words-with-hyphens. ([Markdown](https://happytails.ai/en/text-tools/kebab-case.md))\n\n- [Camel case](https://happytails.ai/en/text-tools/camel-case/): Turn words into a camelCase identifier. ([Markdown](https://happytails.ai/en/text-tools/camel-case.md))\n\n- [Pascal case](https://happytails.ai/en/text-tools/pascal-case/): Turn words into a PascalCase identifier. ([Markdown](https://happytails.ai/en/text-tools/pascal-case.md))\n"
}