Easy way to do it: download open office (here), load the spreadsheet and open the excel file (.xls or .xlsx). Then just save it as a text CSV file and a window opens asking to keep the current format or to save as a .ODF format. select "keep the current format" and in the new window select the option that works better for you, according with the language that your file is been written on. For Spanish language select Western Europe (Windows-1252/ WinLatin 1) and the file works just fine. If you select Unicode (UTF-8), it is not going to work with the spanish characters.

我发现OpenOffice的电子表格应用程序Calc非常擅长处理CSV数据。

在“另存为…”对话框中，单击“格式选项”可获得CSV的不同编码。LibreOffice的工作原理与AFAIK相同。

您可以在Unix下使用iconv命令(也可以在Windows上作为libiconv)。

在Excel下保存为CSV后，在命令行输入:

iconv -f cp1250 -t utf-8 file-encoded-cp1250.csv > file-encoded-utf8.csv

(记住用你的编码替换cp1250)。

工作快速和伟大的大文件，如邮政编码数据库，不能导入到GoogleDocs(400.000单元格限制)。

做到这一点的唯一“简单方法”如下。首先，要意识到Excel .csv文件中显示的内容和隐藏的内容之间是有区别的。

Open an Excel file where you have the info (.xls, .xlsx) In Excel, choose "CSV (Comma Delimited) (*.csv) as the file type and save as that type. In NOTEPAD (found under "Programs" and then Accessories in Start menu), open the saved .csv file in Notepad Then choose -> Save As... and at the bottom of the "save as" box, there is a select box labelled as "Encoding". Select UTF-8 (do NOT use ANSI or you lose all accents etc). After selecting UTF-8, then save the file to a slightly different file name from the original.

该文件采用UTF-8格式，保留所有字符和重音，可以导入，例如，MySQL和其他数据库程序。

这个答案来自这个论坛。

使用Powershell怎么样?

Get-Content 'C:\my.csv' | Out-File 'C:\my_utf8.csv' -Encoding UTF8

简单的方法: 不需要Open office和谷歌文档

Save your file as "Unicode text file"; now you have an unicode text file open it with "notepad" and "Save as" it with selecting "utf-8" or other code page that you want rename file extension from "txt" to "csv". This will result in a tab-delimited UTF-8 csv file. If you want a comma-delimited file, open the csv file you just renamed and replace all tabs with commas. To do this in Notepad on Win 10, simply select one tab field then click Ctrl+H. In the window that opens, type a comma , in the "Replace with" field then click "Replace All". Save your file. The result will be a comma-delimited UTF-8 csv file.

不管怎样，不要用ms office打开它!! 现在您有了一个以制表符分隔的CSV文件。 或者，如果应用步骤5，则使用逗号分隔。