CSV ↔ Excel Converter
Convert CSV to Excel or Excel to CSV with automatic direction detection and batch processing. All operations happen locally in your browser—no file uploads, fully private and free.
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点击选择，或把 CSV / Excel 拖到这里（可多个）
CSV 转成 Excel、Excel 转成 CSV，自动识别方向 · 全程本地处理，不上传服务器
FAQ
How do I choose the conversion direction?
No need to choose—it’s automatically detected: uploading a .csv file converts it to .xlsx, while uploading .xlsx or .xls files converts them to .csv. Multiple files can be processed together, mixed formats supported.
Will Chinese characters be garbled in the exported CSV?
No. The exported CSV includes UTF-8 BOM, so Chinese text opens correctly in Excel without garbling.
What if my Excel file has multiple sheets?
When converting to CSV, each sheet is exported as a separate csv file and bundled into a single zip archive.
Are my files uploaded to servers?
No. All conversions are performed entirely within your browser—your files never leave your device.
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