# xlsx-chat-attachments — Excel workbooks are safe, readable chat attachments

1. I attach an Excel `.xlsx` workbook to a chat, and OpenWork accepts it like Word and PowerPoint files.

2. The attachment appears as an XLSX file card with its original filename and remains downloadable without modification.

3. I send the message, and OpenWork preserves the original workbook while exposing cell values, formulas, formatting, and workbook structure to the assistant.

4. The assistant accurately summarizes the workbook's contents, including text, numeric values, and formulas.

5. I continue the conversation, showing that the spreadsheet attachment does not cause provider errors or break later messages.
