THE MODERN WORKBOOK, MINUS THE WAITING ROOM.
An XLSX viewer.
Built around your privacy.
View an XLSX workbook, move between worksheets, and inspect cell formulas in a familiar spreadsheet workspace.
Drop your spreadsheet here
or choose a file from your device
XLSX WORKBOOKS
Up to 20 MB · Processed locally in your browser
OPEN. WORK. DOWNLOAD.
More than a flat preview.
A workbook you can explore.
XLSX is the native workbook format of the GridCraft engine. The viewer is designed to display worksheet data, styles, formulas, and workbook objects rather than flattening the workbook into a static image. Compatibility is still developing: review complex charts, print layouts, and advanced formulas before relying on the result.
- 01
Choose your XLSX
Open a modern Excel workbook from your device.
- 02
Explore its structure
Switch worksheets and use the formula bar to see what is behind a value.
- 03
Continue working
Use the available editing tools or download a new XLSX copy.
KNOW YOUR WORKSPACE
Useful by design.
Clear about the limits.
A real spreadsheet engine, with compatibility still growing. Keep your original workbook and check important data after editing or conversion.
GridCraft is in alpha. Read the engine’s compatibility notes
| IN YOUR WORKBOOK | WHAT TO EXPECT |
|---|---|
| Values & worksheets | Supported · Multiple sheets and cell data |
| Formulas & formatting | Supported · Compatibility varies by feature |
| Charts & workbook objects | Evolving · Check complex layouts |
| Legacy XLS files | Data import · Values, formulas, number formats |
| XLSB & ODS files | Saved values · Limited formula and style import |
| VBA macros | Not executed |
| Cloud save & collaboration | Not available · Download to keep your work |
A FEW PRACTICAL ANSWERS
Before you open
that workbook.
Your file stays local. Your original stays intact. Your next step stays simple.
What is an XLSX file?
XLSX is the XML-based workbook format used by modern Excel and many other spreadsheet applications. It can contain multiple sheets, formulas, formatting, and other workbook objects.
Are formulas recalculated?
The engine includes a formula calculation system. Unsupported functions or workbook features may produce different results; always verify important calculations.
Will charts look exactly like Excel?
Exact rendering is not guaranteed. Chart and layout support is still evolving in the alpha engine.
Can I view an XLSX file on a phone?
The editor can be opened on a modern phone browser, but the full ribbon workspace is best used on a laptop, desktop, or larger tablet.