Spreadsheets are a critical part of business operations—whether you’re tracking budgets, planning marketing campaigns, or evaluating complex datasets. But sharing .xls and .xlsx files isn’t always simple, especially when your recipient doesn’t have Microsoft Excel installed.
That is where the Excel viewer comes in: upload a workbook and read it in the browser, with nothing installed and no account. It takes XLS, XLSX, CSV and ODS, plus the macro and binary variants (.xlsm, .xlsb) and the templates (.xltx, .xltm), up to 20 MB.
Multiple sheets, pivot tables and embedded charts all render with their structure and formatting. But there is one thing to understand before you trust a number on screen, and it explains most of what looks wrong in a spreadsheet you did not write: a viewer does not recalculate.
Every formula cell holds two things — the formula, and the result Excel worked out at its last calculation. What renders is the second one. Usually that is correct and you never notice. Three cases make it visible: a workbook left on manual calculation, one written by a script that could not evaluate formulas (those cells come up blank or zero), and volatile functions like =TODAY() that only update when Excel opens the file. A pivot table renders from its cached data for the same reason, which is why one can disagree with the sheet it was built from.
This is useful for project managers, accountants and analysts who need to read a workbook on a device without Excel. Rendering happens on our servers, so the device does not have to be powerful.
It is reading rather than analysis: there is no editing, no filtering, no sorting and no formula bar. If a macro-enabled .xlsm goes through, its macros are not run — rendering a workbook is not executing it.
The upload runs over HTTPS, and the workbook is deleted from our servers when the viewing session ends. There is no account, so financial or operational data is not filed under anyone's name. We claim no security certification, so for figures that must not leave your network, use software you host yourself.
Open the Excel viewer and upload the workbook. If it is refused, it is over 20 MB — and embedded images are usually the reason rather than the data.
Word, PowerPoint, Visio, CAD and the rest each have their own page here, 70+ extensions in total. Doconut.app views them; it does not convert or share them. For conversion, that is the sibling site OnlineDocumentViewer.com.