CSV anonymizer

Open CSV anonymizer on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "csv-anonymizer",
  "category": "data-tools",
  "built": true,
  "requirements": "Choose 1 to 10 strictly decoded UTF-8 CSV files. Selected exact headers must exist in every file. Maximum 1,000,000 aggregate file bytes, 10,000 aggregate data records, 100 columns per file and 100,000 aggregate data cells. Mapping export is bounded to 10,000 distinct original values. Aggregate CSV output is capped at 4,000,000 characters. The secret remains in browser memory during use; secure memory erasure is not claimed.",
  "implementation": {
    "fields": [
      {
        "key": "delimiter",
        "label": "Input CSV separator",
        "value": ",",
        "type": "select",
        "values": [
          ",",
          ";",
          "\t"
        ]
      },
      {
        "key": "columns",
        "label": "Identifying columns",
        "value": "email",
        "type": "text",
        "help": "One comma-separated CSV record of exact headers. Quote a header containing a comma. Every selected column must exist in every file."
      },
      {
        "key": "secret",
        "label": "Private pseudonym secret",
        "value": "",
        "type": "password",
        "maxLength": 1024,
        "help": "Use a randomly generated secret of 32 to 1,024 UTF-8 bytes, and keep it separately. A long but predictable password is still weak. The same secret and exact value reproduce the same token across all selected columns and files."
      },
      {
        "key": "exportMapping",
        "label": "Export sensitive original-to-token mapping",
        "value": false,
        "type": "checkbox",
        "help": "Explicit opt-in. The mapping CSV contains original identifiers. Store it separately and securely. It is omitted by default."
      },
      {
        "key": "exportMode",
        "label": "Spreadsheet formula handling",
        "value": "Protect formulas",
        "type": "select",
        "values": [
          "Protect formulas",
          "Preserve original cells"
        ]
      }
    ],
    "registrationFamily": "csv-preparation",
    "presentation": "metrics",
    "note": "Replace identifiers consistently across up to 10 UTF-8 CSV files. These are linkable pseudonyms, not anonymous data: other columns and filenames can still identify people. Keep your secret separately. Mapping export includes original identifiers and is off by default. Processed on your device. CSV downloads protect spreadsheet formula prefixes by default, which changes affected cells.",
    "files": true,
    "multiple": true,
    "input": false,
    "accept": ".csv,.tsv,text/csv,text/tab-separated-values",
    "maxFileBytes": 1000000,
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "CSV files",
      "placeholder": "Choose UTF-8 CSV files",
      "help": "Selected columns are pseudonymized consistently across files. Review remaining data for identifiers. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Selected columns are pseudonymized consistently across files. Review remaining data for identifiers.",
        "Up to 1,000,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "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"
  }
}

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