--- title: "What File Formats are Supported for Editing or Viewing in a Portal" slug: "faq-2" description: "You can edit the following file types in Offline Office within the portal:; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI;, Roboto;Noto Sans;, Ubuntu, & quot;Droid Sans"." updated: 2023-04-18T13:10:09Z published: 2023-04-18T13:10:09Z canonical: "kb.ctera.com/faq-2" --- > ## Documentation Index > Fetch the complete documentation index at: https://kb.ctera.com/llms.txt > Use this file to discover all available pages before exploring further. # What File Formats are Supported for Editing or Viewing in a Portal ## **Via Microsoft Office Online Server** You can edit the following file types in Offline Office within the portal: **Word files** – .docx, .docm, .odt, .doc – When editing any Word file, the file is saved as a .docx file. **Excel files** – .xlsx, .xlsb, .xlsm, .ods, .xls – When editing any Excel file, the file is saved as a .xlsx file. **PowerPoint files** – .pptx, .ppsx, .odp, .ppt – When editing any PowerPoint file, the file is saved as a .pptx file. **Via Portal Preview Server** The following file types are supported: **Document** – DOC, DOCX, XLS, XLSX, PPT, PPTX, RTF, CSV, PDF, ODT, ODS, ODP, and many older document formats **Web** – HTML, SVG **Image** – TIFF, JPG, JPEG, JP2, GIF, PNG, RAS, CAL, MIL, DIB, BMP, PSD, PCT, PCX, DCX, PCD, WMF, EMF, TGA, and many more image formats **Medical Image Files** – DICOM, DCM **CAD** – DGN, DWG, DXF **Email** – EML, MSG **Other** – txt