{
  "title": "CSV to JSON",
  "human_url": "https://happytails.ai/en/data-tools/csv-to-json/",
  "agent_url": "https://happytails.ai/agents/en/data-tools/csv-to-json/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/data-tools/csv-to-json.md",
  "content": "CSV to JSON\nConvert CSV to JSON.\n⌑   Runs on your device\nFrom rows to records\nThe first row supplies the field names. Every following row becomes one JSON object. Quoted separators, escaped quotes and multiline cells are supported.\nKeep your data intact\nValues remain strings, preserving leading zeros. Duplicate or blank headers and rows with inconsistent column counts produce an error. Choose the delimiter used by your file.\nHow to use CSV to JSON\nEnter csv 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 CSV to JSON. Paste the source content and review the available settings. Inspect nested values, numbers, empty cells, and column names before reusing the result.\nUseful next steps\nJSON formatter\nJSON to CSV",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "JSON formatter",
      "url": "https://happytails.ai/en/developer-tools/json-formatter/"
    },
    {
      "name": "JSON to CSV",
      "url": "https://happytails.ai/en/data-tools/json-to-csv/"
    }
  ],
  "tool": {
    "id": "csv-to-json",
    "category": "data-tools",
    "built": true,
    "requirements": "Detect delimiter with override; headers and type inference; preserve identifiers and leading zeros.",
    "implementation": {
      "fields": [
        {
          "key": "delimiter",
          "label": "CSV separator",
          "value": ",",
          "type": "select",
          "values": [
            ",",
            ";",
            "\t"
          ]
        }
      ],
      "experience": {
        "automatic": true,
        "single": false,
        "label": "CSV",
        "placeholder": "name,score\nAda,98\nSam,92",
        "help": "Include a header row. Quote cells that contain commas or new lines. Results update as you type. Up to 1,000,000 characters.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/csv-to-json/run",
    "api": {
      "id": "csv-to-json",
      "name": "CSV to JSON",
      "category": "data-tools",
      "description": "Convert CSV to JSON.",
      "notes": "",
      "human_path": "/en/data-tools/csv-to-json/",
      "method": "POST",
      "endpoint": "/api/v1/tools/csv-to-json/run",
      "schema_url": "/api/v1/tools/csv-to-json",
      "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": {
              "delimiter": {
                "type": "string",
                "description": "CSV separator",
                "default": ",",
                "enum": [
                  ",",
                  ";",
                  "\t"
                ]
              }
            }
          }
        }
      },
      "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": "# CSV to JSON\n\n- Human page: https://happytails.ai/en/data-tools/csv-to-json/\n- Markdown: https://happytails.ai/en/data-tools/csv-to-json.md\n- Structured JSON: https://happytails.ai/agents/en/data-tools/csv-to-json/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `csv-to-json` |\n| Category | data-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/csv-to-json/run |\n| Browser-agent interface | transform_current_tool |\n\n### Inputs and settings\n\nText input: CSV.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nname,score\nAda,98\nSam,92\n```\n\nInclude a header row. Quote cells that contain commas or new lines. Results update as you type. Up to 1,000,000 characters.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `delimiter` | CSV separator | select | \",\" | Allowed: ,, ;, \t |\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/csv-to-json/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/csv-to-json.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        \"delimiter\": {\n          \"type\": \"string\",\n          \"description\": \"CSV separator\",\n          \"default\": \",\",\n          \"enum\": [\n            \",\",\n            \";\",\n            \"\\t\"\n          ]\n        }\n      }\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 `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\nDetect delimiter with override; headers and type inference; preserve identifiers and leading zeros.\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\": \"csv-to-json\",\n  \"category\": \"data-tools\",\n  \"built\": true,\n  \"requirements\": \"Detect delimiter with override; headers and type inference; preserve identifiers and leading zeros.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"delimiter\",\n        \"label\": \"CSV separator\",\n        \"value\": \",\",\n        \"type\": \"select\",\n        \"values\": [\n          \",\",\n          \";\",\n          \"\\t\"\n        ]\n      }\n    ],\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": false,\n      \"label\": \"CSV\",\n      \"placeholder\": \"name,score\\nAda,98\\nSam,92\",\n      \"help\": \"Include a header row. Quote cells that contain commas or new lines. 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/csv-to-json/run\",\n  \"api\": {\n    \"id\": \"csv-to-json\",\n    \"name\": \"CSV to JSON\",\n    \"category\": \"data-tools\",\n    \"description\": \"Convert CSV to JSON.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/data-tools/csv-to-json/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/csv-to-json/run\",\n    \"schema_url\": \"/api/v1/tools/csv-to-json\",\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            \"delimiter\": {\n              \"type\": \"string\",\n              \"description\": \"CSV separator\",\n              \"default\": \",\",\n              \"enum\": [\n                \",\",\n                \";\",\n                \"\\t\"\n              ]\n            }\n          }\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\nConvert CSV to JSON.\n\n⌑   Runs on your device\n\n## From rows to records\n\nThe first row supplies the field names. Every following row becomes one JSON object. Quoted separators, escaped quotes and multiline cells are supported.\n\n## Keep your data intact\n\nValues remain strings, preserving leading zeros. Duplicate or blank headers and rows with inconsistent column counts produce an error. Choose the delimiter used by your file.\n\n## How to use CSV to JSON\n\n1. Enter csv 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 CSV to JSON. Paste the source content and review the available settings. Inspect nested values, numbers, empty cells, and column names before reusing the result.\n\n## Useful next steps\n\n[JSON formatter](https://happytails.ai/en/developer-tools/json-formatter/)\n\n[JSON to CSV](https://happytails.ai/en/data-tools/json-to-csv/)\n"
}