Software & Apps File Types What Is an ET File? How to open, edit, and convert ET files Share Pin Email Print File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More By Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated February 18, 2020 A file with the ET file extension is a WPS Spreadsheets Workbook file created by WPS Office's spreadsheet program. Much like Microsoft's XLSX format, ET files support charts and formulas and store data in rows and columns of cells. ETT files are similar but are template files used to create multiple similar .ET files. The Easiteach software also uses ET files, but as Easiteach Lesson files for storing animations, images, text, and other teaching resources. Some ET files may instead be ETwin Electrodos de Tierra Project Data files used with a program that measures Transformation Center installations. How to Open an ET File ET files that are WPS Spreadsheets Workbook files can be opened with the free WPS Office Spreadsheets. You'll have to convert the ET file if you want to use it in Microsoft Excel or some other spreadsheet program. Skip down to the next section to learn how. ET files can be built from scratch like any other custom spreadsheet, but you can also use the WPS Office spreadsheet program to make ET files from a pre-built template like for calendars, to-do lists, budgets, invoices, and other business or personal uses. Some ET files might be encrypted, so you have to know the password before you can open and edit them. However, it might be possible to open the encrypted spreadsheet if you convert the ET file to a supported format that can be used with a free Excel password cracker. Easiteach Lesson files are opened using RM Education's Easiteach software. They also have Easiteach Next Generation Lite but it can only open other related files like ETNG, ETNT, and ETTE files. ETwin Electrodos de Tierra opens ET files that are used by that program. EST files share a couple of the same file extension letters as ET files, but they don't have anything to do with each other. EST files are either Streets & Tips Map files or Construction Cost Estimate files. The same is true with ETL (Microsoft Event Trace Log) and ETA (Google Earth Placemark) files. If you find that an application on your PC does try to open the ET file but it's the wrong application or if you would rather have another installed program open ET files, you can change the default program for a specific file extension to make that change in Windows. How to Convert an ET File ET spreadsheet files can be converted to XLSX and XLS using WPS Office Spreadsheets. Open the file and go to Menu to find Save As; pick an Excel format to convert the ET file to. You can also convert the ET file to PDF, HTML, CSV, and other similar text files using the programs from above. If any of the ET files that belong to the other programs mentioned above can be converted, it's most likely done through the same software that can open it, similar to how WPS Office Spreadsheets converts files.