Excel Viewer
Look inside a spreadsheet without Excel: switch sheets, read the first rows and check the size of each sheet.
Processed locally in your browser/ Your data stays in your browser.
What is Excel Viewer?
Sometimes you only need to see what is in a workbook: which sheets it has, how big they are and what the data looks like. This viewer reads .xlsx, .xls, .xlsm and .ods files locally and shows a table preview of the selected sheet, limited to the first 500 rows for speed.
A summary lists the file size, the number of sheets, the used range and the row and column count of each sheet, including hidden ones. Cells can be shown as displayed in Excel or as raw values with ISO dates. Formulas show their last calculated value, and macros in .xlsm files are ignored and never executed.
How does it work?
- Drop a spreadsheet file (up to 50 MB) on the drop zone.
- Use the sheet selector above the table to switch between sheets.
- Choose whether the first row is used as column headers and whether to show displayed or raw values.
- Read the summary for dimensions and notes such as hidden sheets or truncation.
Common use cases
- Checking an attachment you do not want to open in a full spreadsheet application.
- Finding which sheet of a large workbook holds the data you need.
- Verifying the size and structure of a workbook before converting it to CSV or JSON.
- Inspecting a file from an untrusted source without running any macro.
Examples
Look inside a spreadsheet without Excel: switch sheets, read the first rows and check the size of each sheet.
Privacy
Excel Viewer runs entirely in your browser. The text or files you provide are processed on your device and are not uploaded, logged or stored on our servers.
Limitations
It is a read-only preview: no editing, formulas, charts, images or formatting. Only the first 500 rows are displayed, although the summary counts all rows.
Frequently asked questions
Is it safe to open .xlsm files here?
Yes. Macros are never loaded or executed; only cell values are read, and the tool tells you when a macro-enabled workbook was opened.
Why do I see column letters as headers?
When the first row is not used as a header, columns are labelled A, B, C like in Excel. Tick the header option to use the first row instead.
Are hidden sheets shown?
Yes, they appear in the sheet list marked as hidden, and can be previewed like any other sheet.
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