diff --git a/src/desktop/MenuPanel.tsx b/src/desktop/MenuPanel.tsx
index ce18b66..2e983f3 100644
--- a/src/desktop/MenuPanel.tsx
+++ b/src/desktop/MenuPanel.tsx
@@ -1,23 +1,15 @@
-import { type KintoneFormFieldProperty, KintoneRestAPIClient } from '@kintone/rest-api-client';
-import dayjs from 'dayjs';
-import Docxtemplater from 'docxtemplater';
-import expressionParser from 'docxtemplater/expressions';
-import { saveAs } from 'file-saver';
+import { KintoneRestAPIClient } from '@kintone/rest-api-client';
+import saveAs from 'file-saver';
 import moize from 'moize';
-import PizZip from 'pizzip';
 import React from 'react';
 import { useTranslation } from 'react-i18next';
-import invariant from 'tiny-invariant';
 import { DOCX_CONTENT_TYPE } from '../common/constants';
 import type { KintoneFormFieldProperties } from '../common/types';
 import KintonePluginAlert from '../common/ui/KintonePluginAlert';
 import KintonePluginButton from '../common/ui/KintonePluginButton';
+import generateWordFileData from './generateWordFileData';
 
-interface TemplateData {
-  [key: string]: TemplateData | TemplateData[] | string | string[];
-}
-
-interface MenuPanelProps {
+export interface MenuPanelProps {
   pluginId: string;
   event: kintone.events.AppRecordDetailShowEvent | kintone.events.MobileAppRecordDetailShowEvent;
 }
@@ -28,167 +20,6 @@ const cachedFormFieldsProperties = moize.promise(async (appId: number): Promise<
   return properties;
 });
 
-const formatNumberValue = (value: string, digit: boolean, scale?: number): string => {
-  if (value !== '' && !Number.isNaN(Number(value))) {
-    const numberValue = Number(value);
-    const options: Intl.NumberFormatOptions = {
-      useGrouping: digit,
-    };
-    if (scale != null && scale >= 0) {
-      options.minimumFractionDigits = scale;
-      options.maximumFractionDigits = scale;
-    }
-    return new Intl.NumberFormat('en-US', options).format(numberValue);
-  }
-  return value;
-};
-
-const formatValueWithUnit = (
-  value: string,
-  property: KintoneFormFieldProperty.Number | KintoneFormFieldProperty.Calc,
-): string => {
-  if (value !== '' && property.unit !== '') {
-    if (property.unitPosition === 'BEFORE') {
-      return `${property.unit} ${value}`;
-    } else if (property.unitPosition === 'AFTER') {
-      return `${value} ${property.unit}`;
-    }
-  }
-  return value;
-};
-
-const formatNumberRecordValue = (
-  value: string,
-  property: KintoneFormFieldProperty.Number | KintoneFormFieldProperty.Lookup,
-): string => {
-  if ('lookup' in property) {
-    return value;
-  }
-  const scale = property.displayScale !== '' ? Number(property.displayScale) : undefined;
-  const digit = property.digit ?? false;
-  const formattedValue = formatNumberValue(value, digit, scale);
-  return formatValueWithUnit(formattedValue, property);
-};
-
-const formatCalculatedRecordValue = (
-  value: string,
-  property: KintoneFormFieldProperty.Calc,
-  language: string,
-): string => {
-  const { format } = property;
-  if (value === '') {
-    return '';
-  }
-  const scale = property.displayScale !== '' ? Number(property.displayScale) : undefined;
-  let formattedValue: string;
-  if (format === 'NUMBER') {
-    formattedValue = formatNumberValue(value, false, scale);
-  } else if (format === 'NUMBER_DIGIT') {
-    formattedValue = formatNumberValue(value, true, scale);
-  } else if (format === 'DATETIME') {
-    // "2025-05-30T00:00:00Z" -> "2025-05-30 9:00" (browser local timezone)
-    const date = new Date(value);
-    invariant(!Number.isNaN(date.getTime()), `Expected value to be a valid date string, but got ${value}`);
-    formattedValue = dayjs(date).format('YYYY-MM-DD h:mm');
-  } else if (format === 'DATE') {
-    // "2025-05-30T00:00:00Z" -> "2025-05-30" (browser local timezone)
-    const date = new Date(value);
-    invariant(!Number.isNaN(date.getTime()), `Expected value to be a valid date string, but got ${value}`);
-    formattedValue = dayjs(date).format('YYYY-MM-DD');
-  } else if (format === 'TIME') {
-    // "00:30" -> "0:30"
-    const [hours, minutes] = value.split(':').map((v) => Number(v));
-    invariant(
-      !Number.isNaN(hours) && !Number.isNaN(minutes),
-      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
-    );
-    formattedValue = `${hours}:${String(minutes).padStart(2, '0')}`;
-  } else if (format === 'HOUR_MINUTE') {
-    // "49:30" -> en:"49 hours 30 minutes", ja: "49時間30分"
-    const [hours, minutes] = value.split(':').map((v) => Number(v));
-    invariant(
-      !Number.isNaN(hours) && !Number.isNaN(minutes),
-      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
-    );
-    formattedValue = language === 'ja' ? `${hours}時間${minutes}分` : `${hours} hours ${minutes} minutes`;
-  } else if (format === 'DAY_HOUR_MINUTE') {
-    // "49:30" -> en: "2 days 1 hour 30 minutes", ja: "2日1時間30分
-    const [hours, minutes] = value.split(':').map((v) => Number(v));
-    invariant(
-      !Number.isNaN(hours) && !Number.isNaN(minutes),
-      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
-    );
-    const days = Math.floor(Number(hours) / 24);
-    const remainingHours = Number(hours) % 24;
-    formattedValue =
-      language === 'ja'
-        ? `${days}日${remainingHours}時間${minutes}分`
-        : `${days} days ${remainingHours} hours ${minutes} minutes`;
-  } else {
-    // DATETIME, DATE, TIME
-    formattedValue = value;
-  }
-  return formatValueWithUnit(formattedValue, property);
-};
-
-const record2data = (
-  properties: KintoneFormFieldProperties,
-  record: Partial<kintone.types.GenericFields>,
-  language: string,
-): TemplateData => {
-  const data: TemplateData = {};
-  for (const key in record) {
-    // biome-ignore lint/suspicious/noPrototypeBuiltins: avoid prototype pollution
-    if (Object.prototype.hasOwnProperty.call(record, key) && Object.prototype.hasOwnProperty.call(properties, key)) {
-      const item = record[key];
-      const property = properties[key];
-      if (item == null) continue;
-      const { type, value } = item;
-      if (value == null) {
-        data[key] = '';
-      } else if (type === 'CREATOR' || type === 'MODIFIER') {
-        data[key] = {
-          name: value.name,
-          code: value.code,
-        };
-      } else if (type === 'NUMBER') {
-        invariant(property.type === 'NUMBER', `Expected property type to be NUMBER, but got ${property.type}`);
-        data[key] = formatNumberRecordValue(value, property);
-      } else if (type === 'CALC') {
-        invariant(property.type === 'CALC', `Expected property type to be CALC, but got ${property.type}`);
-        data[key] = formatCalculatedRecordValue(value, property, language);
-      } else if (type === 'CHECK_BOX' || type === 'MULTI_SELECT' || type === 'CATEGORY') {
-        data[key] = value.map((v) => v);
-      } else if (
-        type === 'USER_SELECT' ||
-        type === 'ORGANIZATION_SELECT' ||
-        type === 'GROUP_SELECT' ||
-        type === 'STATUS_ASSIGNEE'
-      ) {
-        data[key] = value.map((v) => {
-          return { name: v.name, code: v.code };
-        });
-      } else if (type === 'SUBTABLE') {
-        invariant(property.type === 'SUBTABLE', `Expected property type to be SUBTABLE, but got ${property.type}`);
-        data[key] = value.map((subRecord) => record2data(property.fields, subRecord.value, language));
-      } else if (type === 'FILE') {
-        invariant(property.type === 'FILE', `Expected property type to be FILE, but got ${property.type}`);
-        data[key] = value.map((file) => ({
-          name: file.name,
-          size: file.size,
-          contentType: file.contentType,
-          fileKey: file.fileKey,
-        }));
-      } else {
-        // RECORD_NUMBER, __ID__, __REVISION__, CREATED_TIME, UPDATED_TIME
-        // SINGLE_LINE_TEXT, MULTI_LINE_TEXT, RICH_TEXT, RADIO_BUTTON, DROP_DOWN, DATE, TIME, DATETIME, LINK, STATUS
-        data[key] = value;
-      }
-    }
-  }
-  return data;
-};
-
 const MenuPanel: React.FC<MenuPanelProps> = (props) => {
   const { pluginId, event } = props;
   const { t } = useTranslation();
@@ -249,15 +80,7 @@ const MenuPanel: React.FC<MenuPanelProps> = (props) => {
     client.file
       .downloadFile({ fileKey })
       .then((content) => {
-        const zip = new PizZip(content);
-        const doc = new Docxtemplater(zip, {
-          paragraphLoop: true,
-          linebreaks: true,
-          parser: expressionParser,
-          nullGetter: () => '',
-        });
-        doc.render(record2data(properties, event.record, language));
-        const out = doc.getZip().generate({ type: 'blob', mimeType: DOCX_CONTENT_TYPE });
+        const out = generateWordFileData(content, properties, event.record, language);
         saveAs(out, 'output.docx');
       })
       .catch((error) => {
diff --git a/src/desktop/generateWordFileData.ts b/src/desktop/generateWordFileData.ts
new file mode 100644
index 0000000..d5788ef
--- /dev/null
+++ b/src/desktop/generateWordFileData.ts
@@ -0,0 +1,192 @@
+import type { KintoneFormFieldProperty } from '@kintone/rest-api-client';
+import dayjs from 'dayjs';
+import Docxtemplater from 'docxtemplater';
+import expressionParser from 'docxtemplater/expressions';
+import PizZip from 'pizzip';
+import invariant from 'tiny-invariant';
+import { DOCX_CONTENT_TYPE } from '../common/constants';
+import type { KintoneFormFieldProperties } from '../common/types';
+
+interface TemplateData {
+  [key: string]: TemplateData | TemplateData[] | string | string[];
+}
+
+const formatNumberValue = (value: string, digit: boolean, scale?: number): string => {
+  if (value !== '' && !Number.isNaN(Number(value))) {
+    const numberValue = Number(value);
+    const options: Intl.NumberFormatOptions = {
+      useGrouping: digit,
+    };
+    if (scale != null && scale >= 0) {
+      options.minimumFractionDigits = scale;
+      options.maximumFractionDigits = scale;
+    }
+    return new Intl.NumberFormat('en-US', options).format(numberValue);
+  }
+  return value;
+};
+
+const formatValueWithUnit = (
+  value: string,
+  property: KintoneFormFieldProperty.Number | KintoneFormFieldProperty.Calc,
+): string => {
+  if (value !== '' && property.unit !== '') {
+    if (property.unitPosition === 'BEFORE') {
+      return `${property.unit} ${value}`;
+    } else if (property.unitPosition === 'AFTER') {
+      return `${value} ${property.unit}`;
+    }
+  }
+  return value;
+};
+
+const formatNumberRecordValue = (
+  value: string,
+  property: KintoneFormFieldProperty.Number | KintoneFormFieldProperty.Lookup,
+): string => {
+  if ('lookup' in property) {
+    return value;
+  }
+  const scale = property.displayScale !== '' ? Number(property.displayScale) : undefined;
+  const digit = property.digit ?? false;
+  const formattedValue = formatNumberValue(value, digit, scale);
+  return formatValueWithUnit(formattedValue, property);
+};
+
+const formatCalculatedRecordValue = (
+  value: string,
+  property: KintoneFormFieldProperty.Calc,
+  language: string,
+): string => {
+  const { format } = property;
+  if (value === '') {
+    return '';
+  }
+  const scale = property.displayScale !== '' ? Number(property.displayScale) : undefined;
+  let formattedValue: string;
+  if (format === 'NUMBER') {
+    formattedValue = formatNumberValue(value, false, scale);
+  } else if (format === 'NUMBER_DIGIT') {
+    formattedValue = formatNumberValue(value, true, scale);
+  } else if (format === 'DATETIME') {
+    // "2025-05-30T00:00:00Z" -> "2025-05-30 9:00" (browser local timezone)
+    const date = new Date(value);
+    invariant(!Number.isNaN(date.getTime()), `Expected value to be a valid date string, but got ${value}`);
+    formattedValue = dayjs(date).format('YYYY-MM-DD h:mm');
+  } else if (format === 'DATE') {
+    // "2025-05-30T00:00:00Z" -> "2025-05-30" (browser local timezone)
+    const date = new Date(value);
+    invariant(!Number.isNaN(date.getTime()), `Expected value to be a valid date string, but got ${value}`);
+    formattedValue = dayjs(date).format('YYYY-MM-DD');
+  } else if (format === 'TIME') {
+    // "00:30" -> "0:30"
+    const [hours, minutes] = value.split(':').map((v) => Number(v));
+    invariant(
+      !Number.isNaN(hours) && !Number.isNaN(minutes),
+      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
+    );
+    formattedValue = `${hours}:${String(minutes).padStart(2, '0')}`;
+  } else if (format === 'HOUR_MINUTE') {
+    // "49:30" -> en:"49 hours 30 minutes", ja: "49時間30分"
+    const [hours, minutes] = value.split(':').map((v) => Number(v));
+    invariant(
+      !Number.isNaN(hours) && !Number.isNaN(minutes),
+      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
+    );
+    formattedValue = language === 'ja' ? `${hours}時間${minutes}分` : `${hours} hours ${minutes} minutes`;
+  } else if (format === 'DAY_HOUR_MINUTE') {
+    // "49:30" -> en: "2 days 1 hour 30 minutes", ja: "2日1時間30分
+    const [hours, minutes] = value.split(':').map((v) => Number(v));
+    invariant(
+      !Number.isNaN(hours) && !Number.isNaN(minutes),
+      `Expected hours and minutes to be numbers, but got hours: ${hours}, minutes: ${minutes}`,
+    );
+    const days = Math.floor(Number(hours) / 24);
+    const remainingHours = Number(hours) % 24;
+    formattedValue =
+      language === 'ja'
+        ? `${days}日${remainingHours}時間${minutes}分`
+        : `${days} days ${remainingHours} hours ${minutes} minutes`;
+  } else {
+    // DATETIME, DATE, TIME
+    formattedValue = value;
+  }
+  return formatValueWithUnit(formattedValue, property);
+};
+
+const record2templateData = (
+  properties: KintoneFormFieldProperties,
+  record: Partial<kintone.types.GenericFields>,
+  language: string,
+): TemplateData => {
+  const data: TemplateData = {};
+  for (const key in record) {
+    // biome-ignore lint/suspicious/noPrototypeBuiltins: avoid prototype pollution
+    if (Object.prototype.hasOwnProperty.call(record, key) && Object.prototype.hasOwnProperty.call(properties, key)) {
+      const item = record[key];
+      const property = properties[key];
+      if (item == null) continue;
+      const { type, value } = item;
+      if (value == null) {
+        data[key] = '';
+      } else if (type === 'CREATOR' || type === 'MODIFIER') {
+        data[key] = {
+          name: value.name,
+          code: value.code,
+        };
+      } else if (type === 'NUMBER') {
+        invariant(property.type === 'NUMBER', `Expected property type to be NUMBER, but got ${property.type}`);
+        data[key] = formatNumberRecordValue(value, property);
+      } else if (type === 'CALC') {
+        invariant(property.type === 'CALC', `Expected property type to be CALC, but got ${property.type}`);
+        data[key] = formatCalculatedRecordValue(value, property, language);
+      } else if (type === 'CHECK_BOX' || type === 'MULTI_SELECT' || type === 'CATEGORY') {
+        data[key] = value.map((v) => v);
+      } else if (
+        type === 'USER_SELECT' ||
+        type === 'ORGANIZATION_SELECT' ||
+        type === 'GROUP_SELECT' ||
+        type === 'STATUS_ASSIGNEE'
+      ) {
+        data[key] = value.map((v) => {
+          return { name: v.name, code: v.code };
+        });
+      } else if (type === 'SUBTABLE') {
+        invariant(property.type === 'SUBTABLE', `Expected property type to be SUBTABLE, but got ${property.type}`);
+        data[key] = value.map((subRecord) => record2templateData(property.fields, subRecord.value, language));
+      } else if (type === 'FILE') {
+        invariant(property.type === 'FILE', `Expected property type to be FILE, but got ${property.type}`);
+        data[key] = value.map((file) => ({
+          name: file.name,
+          size: file.size,
+          contentType: file.contentType,
+          fileKey: file.fileKey,
+        }));
+      } else {
+        // RECORD_NUMBER, __ID__, __REVISION__, CREATED_TIME, UPDATED_TIME
+        // SINGLE_LINE_TEXT, MULTI_LINE_TEXT, RICH_TEXT, RADIO_BUTTON, DROP_DOWN, DATE, TIME, DATETIME, LINK, STATUS
+        data[key] = value;
+      }
+    }
+  }
+  return data;
+};
+
+const generateWordFileData = (
+  content: ArrayBuffer,
+  properties: KintoneFormFieldProperties,
+  record: kintone.types.GenericFields,
+  language: string,
+) => {
+  const zip = new PizZip(content);
+  const doc = new Docxtemplater(zip, {
+    paragraphLoop: true,
+    linebreaks: true,
+    parser: expressionParser,
+    nullGetter: () => '',
+  });
+  doc.render(record2templateData(properties, record, language));
+  return doc.getZip().generate({ type: 'blob', mimeType: DOCX_CONTENT_TYPE });
+};
+
+export default generateWordFileData;