CSV encoding repair

Open CSV encoding repair 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-encoding-repair",
  "category": "data-tools",
  "built": true,
  "requirements": "One nonempty file up to 1,000,000 raw bytes, 10,000 data records, 100 columns and 100,000 data cells. Candidate previews show the first 600 decoded characters. Replacement counts include literal U+FFFD characters already in the file. Mojibake warning patterns can match legitimate text. Comparison alone produces no repaired CSV. Output is capped at 4,000,000 CSV characters.",
  "implementation": {
    "fields": [
      {
        "key": "delimiter",
        "label": "Input CSV separator",
        "value": ",",
        "type": "select",
        "values": [
          ",",
          ";",
          "\t"
        ]
      },
      {
        "key": "encoding",
        "label": "Confirmed source encoding",
        "value": "Compare only",
        "type": "select",
        "values": [
          "Compare only",
          "utf-8",
          "windows-1252",
          "utf-16le",
          "utf-16be",
          "shift_jis"
        ]
      },
      {
        "key": "confirmEncoding",
        "label": "I reviewed the candidate text and confirm this encoding",
        "value": false,
        "type": "checkbox"
      },
      {
        "key": "allowReplacement",
        "label": "Allow replacement characters and possible data loss",
        "value": false,
        "type": "checkbox",
        "help": "Required if the selected decoding has malformed bytes or U+FFFD characters. Replacement counts include any literal U+FFFD characters already present in the source."
      },
      {
        "key": "bom",
        "label": "Add UTF-8 BOM to the exported CSV",
        "value": false,
        "type": "checkbox"
      },
      {
        "key": "exportMode",
        "label": "Spreadsheet formula handling",
        "value": "Protect formulas",
        "type": "select",
        "values": [
          "Protect formulas",
          "Preserve original cells"
        ]
      }
    ],
    "registrationFamily": "csv-preparation",
    "presentation": "metrics",
    "note": "Compare the previews first, then select and confirm the source encoding. The comparison does not identify the correct encoding. Export rewrites the file as quoted UTF-8 CSV; it cannot recover text already lost. Processed on your device. CSV downloads protect spreadsheet formula prefixes by default, which changes affected cells.",
    "files": true,
    "multiple": false,
    "input": false,
    "accept": ".csv,.tsv,.txt,text/csv,text/plain",
    "maxFileBytes": 1000000,
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Raw CSV file",
      "placeholder": "Choose the original file bytes",
      "help": "Compare candidates first. Select and confirm an encoding before creating a UTF-8 CSV. Up to 1,000,000 characters. Review the settings before running.",
      "helpParts": [
        "Compare candidates first. Select and confirm an encoding before creating a UTF-8 CSV.",
        "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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