Excel File Viewer
Upload an XLS, XLSX, CSV, ODS, XLSM, XLSB, XLTX or XLTM file up to 20 MB. It opens in the browser — no Excel, nothing to install.
XLSX sheets and charts, rendered in your app: Doconut SDK.
Drop a file here, or click to select
Supported formats: .xls, .xlsx, .csv, .ods, .xlsm, .xlsb, .xltx, .xltm
Max 20 MB
Upload
Select your file
Process
Secure rendering
View
Instant preview
What renders, and what does not
Upload the file. The sheet opens at full layout: column widths, merged cells, number and date formats, embedded charts. Formula cells show their result, not the formula text. Macros in an XLSM are never run — the workbook is drawn, not executed.
Eight extensions are accepted: XLS, XLSX, CSV, ODS, XLSM, XLSB, XLTX, XLTM. The limit is 20 MB per upload. Protected workbook? Type the password into the field under the upload box. Files are deleted from the server after viewing.
Viewing is not the only option. XLS and XLSX convert to PDF, JPG or PNG here, up to 5 MB — usually because the person receiving the numbers should read them, not edit them.
Embedded charts
Bar, line and pie charts render with the sheet.
Cell results
Formula cells display their value, not the formula.
Whole workbook
Every sheet in the file, not only the active tab.
Auto-delete
Uploads are removed from the server after viewing.
Accepted spreadsheet formats
Opens in the browser. 20 MB limit.
.xls
.xls
Opens in the browser. 20 MB limit.
.xlsx
Opens in the browser. 20 MB limit.
.csv
Opens in the browser. 20 MB limit.
.ods
Opens in the browser. 20 MB limit.
Common tasks
Read an attachment
Upload the XLSX. It opens. Nothing is installed.
Open a large CSV
Exported data displays as columns instead of raw text.
Send it as a PDF
XLS and XLSX convert to PDF, JPG or PNG, up to 5 MB.
Excel rendering inside your own app
The same engine ships as a .NET SDK: 75 extensions across 18 families, self-hosted.
Doconut SDK