ET Converter
DevConverter is an online document and spreadsheet converter. Amongst many others, we support PDF, XLSX, XLS, CSV, ODS. Thanks to our advanced conversion technology the quality of the output will be exactly the same as if the file was saved through the latest Microsoft Office 2019 suite.
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ET
ET files are spreadsheets, created with Kingsoft Spreadsheets. It is part of the WPS Office suite.