Supported File Formats

Use This Doc For

Which files are read

Kind Read directly Read through the document converter
Documents .docx, .pdf, .txt, .md Word 97-2003 .doc, Rich Text .rtf, OpenDocument .odt
Spreadsheets .xlsx, .csv, .tsv Excel 97-2003 .xls, OpenDocument .ods
Presentations — .pptx, PowerPoint 97-2003 .ppt, OpenDocument .odp (the slide text)

The platform checks what a file actually contains, not only its name. A .docx that was renamed .doc is read as the .docx it really is.

Files in the right-hand column are first converted into the format in the middle column, then read the same way. An .xls or .ods therefore imports into a Workbook exactly as an .xlsx does. Presentations contribute their slide text to the coworker and to onboarding; they do not become a Workbook table.

Size limits do not change with the format. A coworker attachment is limited to 10 MB.

Hidden characters are removed

Text can hide characters that do not show on screen but that an AI model still reads. Attackers use them to slip instructions into a document, a web page or an email. Before a coworker reads an uploaded file, the platform removes these hidden characters from the copy the coworker sees. Emoji, flags, the joining marks Persian and Hindi need, and the direction marks Arabic and Hebrew text needs are kept. The file and its text are stored exactly as you uploaded them.

A coworker treats the content of a file as information to work with, never as instructions. If a file asks the coworker to do something, the coworker tells you what the file says instead of doing it.

When the converter is off

The document converter is part of the platform, but not every installation has it switched on. When it is off, a file from the right-hand column is still stored, and the page says in plain words that its content could not be read, along with the format to save it in instead (for example, save an .xls as .xlsx or CSV). Nothing is stored as garbled text.

When a conversion is attempted but does not finish, because the file is too large, takes too long, or is damaged or password-protected, the message says which of these happened.

OpenDocument files can carry embedded objects, such as a chart. The converter does not open embedded objects, for safety. A normal .odt or .ods with a chart is still read: its text and numbers come through, and its PDF copy shows the chart as a picture. If the converter refuses a file because of its embedded objects, the message says that the file contains embedded objects (such as charts) that the platform does not open. Save a copy without them, or as PDF, and upload that instead.

For the technical detail behind the converter, see the platform-support watchlist entry D18 in the install documentation.