CSV to Excel
Convert CSV data into a standard XLSX workbook
CSV to Excel — what it does
Convert CSV text into a real XLSX workbook with a worksheet name of your choosing. The output is a genuine Excel file rather than a renamed CSV, which means it opens without the import dialog, keeps its column layout, and can be attached to an email as a working spreadsheet.
When this tool helps
- Sending a colleague a report they can open by double-clicking, with no delimiter or encoding prompts.
- Preparing a file for a system that accepts XLSX uploads but rejects plain CSV.
- Getting a clean starting point for formatting, formulas and charts in Excel or a compatible application.
How to use it
- Choose the CSV file.
- Enter a worksheet name.
- Process the conversion.
- Download the XLSX workbook.
Accuracy, limits, and good practice
- Excel may reformat values that look like dates or long numbers on open; check identifiers with leading zeros after conversion.
- One CSV becomes one worksheet. To build a multi-sheet workbook, convert each file and combine them with the merge Excel files tool.
- Values are written as data, not formulas, so nothing recalculates — which is exactly what you want for a fixed report.
- Open the converted workbook and check one row against the source before sending it on; conversion problems show up in the data long before anyone reports them.
Frequently asked questions
Is this different from renaming the file to .xlsx?
Completely. Renaming produces a file Excel warns about; this writes a real XLSX package that opens cleanly everywhere.
Do special characters survive?
Yes. XLSX stores text as Unicode, so accented and CJK characters are preserved without the encoding problems CSV can suffer.
Can I convert back later?
Yes, the Excel to CSV tool exports any worksheet back to CSV whenever you need the plain text form again.
Can I convert several CSVs into one workbook?
Convert each separately, then combine the results with the merge Excel files tool in separate-worksheet mode.
Related tools on this site
- CSV Group & Aggregate — Group rows and calculate sum, average, count, min, or max
- Excel Column Extractor — Select specific worksheet columns and export a smaller Excel workbook
- Excel Worksheet Comparison — Compare two worksheets cell by cell and export a difference report
Everything above runs inside this page. CSV to Excel needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
CSV 轉 Excel能做什麼
把 CSV 文字轉成真正的 XLSX 活頁簿，並可自訂工作表名稱。輸出的是名副其實的 Excel 檔，而不是改了副檔名的 CSV，因此開啟時不會跳出匯入對話框、欄位配置完整保留，也能當成可直接使用的試算表寄出去。
什麼時候用得上
- 寄給同事一份雙擊即可開啟的報表，不必面對分隔符或編碼提示。
- 為只接受 XLSX 上傳、不收純 CSV 的系統準備檔案。
- 在 Excel 或相容軟體中做格式、公式與圖表時，先取得乾淨的起點。
使用步驟
- 選擇 CSV 檔案。
- 輸入工作表名稱。
- 執行轉換。
- 下載 XLSX 活頁簿。
精確度、限制與實務建議
- Excel 開啟時可能自動重新格式化看起來像日期或長數字的值，轉換後請檢查帶前置零的識別碼。
- 一份 CSV 轉出一個工作表。要做多工作表活頁簿，請各自轉換後再用合併 Excel 檔案工具整合。
- 所有值都以資料而非公式寫入，因此不會重新計算，對固定報表而言正是所需。
- 寄出前請開啟轉換後的活頁簿，挑一列與來源核對；轉換問題總是先出現在資料裡，很久之後才有人回報。
常見問題
跟直接把副檔名改成 .xlsx 有差嗎？
完全不同。改名產生的檔案 Excel 會跳警告；這裡寫出的是真正的 XLSX 封裝，各處都能正常開啟。
特殊字元會保留嗎？
會。XLSX 以 Unicode 儲存文字，重音字與中日韓字元都不會遇到 CSV 常見的編碼問題。
之後可以轉回去嗎？
可以，需要純文字格式時，用 Excel 轉 CSV 工具即可把任一工作表匯出成 CSV。
可以把多個 CSV 轉成同一份活頁簿嗎？
請各自轉換後，再用合併 Excel 檔案工具以「保留獨立工作表」模式整合。
本站相關工具
- CSV 分組彙總 — 依欄位分組並計算加總、平均、計數、最小或最大值
- Excel 欄位提取器 — 選擇指定工作表欄位並匯出較小的 Excel 活頁簿
- Excel 工作表比較 — 逐一比較兩個工作表的儲存格並匯出差異報告
以上步驟全部在這個頁面內完成，CSV 轉 Excel 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。