JSON to CSV | agent view

The same page content and links, with explicit tool capabilities. Tools marked with an API can run directly through HTTP. Other tools require the browser interface or are not connected yet.

Tool capabilities

{
  "id": "json-to-csv",
  "category": "data-tools",
  "built": true,
  "requirements": "Define nested-array flattening, null handling and column order; protect spreadsheet exports.",
  "implementation": {
    "fields": [
      {
        "key": "delimiter",
        "label": "CSV separator",
        "value": ",",
        "type": "select",
        "values": [
          ",",
          ";",
          "\t"
        ]
      },
      {
        "key": "safe",
        "label": "Protect spreadsheet formulas",
        "value": true,
        "type": "checkbox"
      }
    ],
    "experience": {
      "automatic": true,
      "single": false,
      "label": "JSON",
      "placeholder": "{\"name\":\"Ada\",\"count\":2}",
      "help": "Use double-quoted property names and valid JSON values. Results update as you type. Up to 1,000,000 characters.",
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/json-to-csv/run",
  "api": {
    "id": "json-to-csv",
    "name": "JSON to CSV",
    "category": "data-tools",
    "description": "Convert JSON to CSV.",
    "notes": "",
    "human_path": "/en/data-tools/json-to-csv/",
    "method": "POST",
    "endpoint": "/api/v1/tools/json-to-csv/run",
    "schema_url": "/api/v1/tools/json-to-csv",
    "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"
              ]
            },
            "safe": {
              "type": "boolean",
              "description": "Protect spreadsheet formulas",
              "default": true
            }
          }
        }
      }
    },
    "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"
  }
}

Page guide

Convert JSON to CSV.

⌑ Runs on your device

How the conversion works

Paste a JSON array of records. Keys become column headers; missing values become empty cells. Nested objects and arrays are written as JSON inside a cell. Formula protection adds an apostrophe to text beginning with spreadsheet operators.

Good to know

Use quotes around large integer IDs before converting. Values outside JavaScript’s safe integer range are rejected. CSV does not retain JSON types, so a round trip can change numbers, nulls and strings.

How to use JSON to CSV

Enter json in the input field.
The result updates as you type. Adjust the available settings if needed.
Review the result, then use Copy result or a download link when available.