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1. Convert Online
2. Document Converters
3. XLS to XLSX

{
  "convert": "xls-xlsx",
  "multiple": true,
  "from": "xls",
  "to": "xlsx",
  "controls": [
    {
      "type": "checkbox",
      "name": "preserve_formatting",
      "label": "Preserve Formatting",
      "defaultValue": true,
      "desc": "Keeps original cell formatting, fonts, colors, and styles from the XLS file during conversion."
    },
    {
      "type": "checkbox",
      "name": "preserve_formulas",
      "label": "Preserve Formulas",
      "defaultValue": true,
      "desc": "Retains original formulas instead of converting them to static values. May alter behavior if the formulas use deprecated Excel functions."
    },
    {
      "type": "checkbox",
      "name": "preserve_macros",
      "label": "Preserve Macros",
      "defaultValue": false,
      "desc": "Attempts to preserve VBA macros during conversion. XLSX files normally do not store macros (use XLSM format if needed)."
    },
    {
      "type": "checkbox",
      "name": "recalculate_formulas",
      "label": "Recalculate Formulas",
      "defaultValue": true,
      "desc": "Recalculates all formulas upon opening in the target application to ensure updated results."
    },
    {
      "type": "checkbox",
      "name": "remove_hidden_sheets",
      "label": "Remove Hidden Sheets",
      "defaultValue": false,
      "desc": "Deletes any hidden worksheets from the converted file."
    },
    {
      "type": "dropdown",
      "name": "image_compression",
      "label": "Image Compression",
      "options": [
        {
          "label": "None (retain original)",
          "value": "none"
        },
        {
          "label": "Low (small file size)",
          "value": "low"
        },
        {
          "label": "Medium (balanced)",
          "value": "medium"
        },
        {
          "label": "High (better quality)",
          "value": "high"
        }
      ],
      "defaultValue": "medium",
      "desc": "Controls compression level for embedded images within the spreadsheet."
    },
    {
      "type": "checkbox",
      "name": "password_protect",
      "label": "Password Protect Output",
      "defaultValue": false,
      "desc": "Applies a password to the converted XLSX file. You'll be prompted for the password during conversion."
    },
    {
      "type": "text",
      "name": "metadata_author",
      "label": "Author Metadata",
      "optional": true,
      "placeholder": "e.g., John Smith",
      "desc": "Sets the 'Author' field in the spreadsheet metadata."
    },
    {
      "type": "checkbox",
      "name": "remove_personal_info",
      "label": "Remove Personal Information",
      "defaultValue": false,
      "desc": "Removes personal metadata such as author name, company name, and document history from the converted file."
    }
  ],
  "note": "XLS is the legacy binary Excel format, while XLSX is the modern XML-based format with better compatibility, smaller file size, and improved corruption recovery. During conversion, features unsupported by XLSX (such as certain macro storage or Excel 4.0 macros) may be lost. If macros must be preserved, consider converting to XLSM instead.",
  "type": "document",
  "operation": "convert"
}