Free Online Excel Viewer (No Signup)
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What Is an Excel File?
Microsoft Excel has saved workbooks in two families of format. Since Excel 2007 the default is .xlsx, an Office Open XML package: a ZIP archive with one XML part per worksheet under xl/worksheets/, the text of every cell pooled in sharedStrings.xml and the formatting in styles.xml. A .xlsm is the same package with a macro project attached, and a .xlsb keeps the sheets as binary records inside the ZIP. Before 2007 Excel wrote .xls, a stream of BIFF records inside an OLE compound file: BIFF8 from Excel 97 to 2003, BIFF5 from Excel 5 and 95.
Other programs have their own workbook formats. LibreOffice and OpenOffice Calc save OpenDocument .ods, Apple Numbers saves .numbers, and almost every database, instrument and web export can write a .csv or .tsv: plain text with one row per line and the fields split by a comma, semicolon, tab or pipe. A CSV holds no formatting, only the values as written.
This viewer opens all of them as a table sheet in your browser: the grid with column letters and row numbers, the values as the file formats them (currency, dates, percentages), the file’s column widths and row heights, cell fills, bold, italic and colored text, alignment, wrapped text and merged cells. Each sheet of a workbook is one choice in the sheet picker. The header strips and any frozen panes stay pinned while you scroll. Charts and pictures are counted on the status line and are not drawn.
Who Uses Excel Files?
Nearly every office sends spreadsheets: budgets and cost estimates, schedules, fixture and equipment lists, bills of materials, test results and survey data. They arrive as email attachments on phones, Chromebooks and work machines that have no copy of Excel, and as CSV exports from lab instruments, data loggers, accounting systems and web dashboards. A browser viewer lets anyone read the numbers without installing an office suite or signing in to an online one.
Common Use Cases
- Read an .xlsx or .xls someone emailed you on a computer without Excel
- Check a price list, schedule or bill of materials on a phone or Chromebook
- Open a Numbers file from a Mac user on Windows, Linux or Android
- Look at a CSV export from an instrument, data logger or database and see which delimiter and encoding it uses
- Page through every sheet of a workbook to find the one you need
- Save a sheet as a PNG or JPG image to paste into a report or a message
Features
Every Excel Format
Opens .xlsx, .xlsm and .xlsb from Excel 2007 and later, and Excel 97-2003 .xls in both BIFF8 and the older BIFF5 written by Excel 5 and 95.
ODS, Numbers and CSV Too
LibreOffice and OpenOffice .ods, Apple .numbers from Numbers 3 and later, and .csv or .tsv text all open as the same table sheet.
Values As Formatted
Numbers, dates, currency and percentages appear with the file’s own number formats, showing the results the spreadsheet app saved for each formula.
The File’s Layout
Column widths and row heights (hidden rows and columns stay hidden), cell fills, bold, italic, underlined and colored text, font sizes, alignment and wrapped text.
Merged Cells
Merged ranges are drawn as one cell, and long text spills into empty neighbouring cells the way it does in a spreadsheet app.
Pinned Headers and Frozen Panes
The column letters, the row numbers and any frozen rows or columns stay pinned to the edge of the view while the sheet scrolls.
Sheet Picker
Every sheet of a workbook is listed by name, hidden ones marked, and the workbook opens on the sheet that was active when it was saved.
CSV Delimiter and Encoding Detected
Comma, semicolon, tab or pipe; UTF-8, UTF-16 or Windows-1252; decimal commas in semicolon files. Numbers are right-aligned and a header row is frozen.
Clear Limits
A sheet shows its first 10,000 rows and 256 columns, and the status line gives the full size plus any charts and pictures that are not drawn.
Macros Never Run
An .xlsm opens as a workbook. Its macro project is never read, interpreted or executed.
Nothing Is Uploaded
The workbook is read on a background thread in your browser. No account, no upload, no copy of your data on a server.
Export as PNG or JPG
Save the current view of a sheet as an image, or share a link that opens the spreadsheet in any browser.
Compatibility & Format Notes
Reads Excel .xlsx, .xlsm and .xlsb from Excel 2007 and later, Excel 97-2003 .xls in BIFF8 and the older BIFF5 written by Excel 5 and 95, OpenDocument .ods from LibreOffice and OpenOffice Calc, Apple Numbers files from Numbers 3 and later, and any .csv or .tsv. Files exported from Google Sheets in any of these formats open the same way. The workbook reader is the SheetJS Community Edition, and the whole read runs in your browser on a background thread.
Cells show the values stored in the file, formatted with the file’s own number and date formats. Formulas are not recalculated: each formula cell shows the result the spreadsheet app saved with it. Charts, pictures and cell borders are not drawn (the light grid is the viewer’s own), and the status line says how many charts and pictures the workbook holds. Macros in an .xlsm are never read or run.
A sheet shows its first 10,000 rows and 256 columns; a longer sheet says so under the grid and on the status line. A workbook protected with a password to open is encrypted, so the viewer says so and explains how to save an unprotected copy. A Numbers file whose tables cannot be read shows the preview picture Numbers saved inside it, labelled as a picture.
Embed on Your Website
Add this viewer to your own site with a single line of HTML. Click Embed in the toolbar to generate an embed code, or use the snippet below with your own file URL.
Your Files Stay on Your Computer
Your Excel files are parsed entirely in your browser. Nothing is uploaded, stored, or shared unless you explicitly click the Share button. Shared files are hosted for 90 days then deleted.
Frequently Asked Questions
▶Can I open .xls, .ods, .numbers and .csv files here too?
Yes. Besides .xlsx, .xlsm and .xlsb, the viewer reads Excel 97-2003 .xls (BIFF8 and BIFF5), OpenDocument .ods, Apple .numbers and delimited text in .csv or .tsv. The file is recognised from its contents, so each opens as the same table sheet.
▶Are formulas recalculated?
No. Excel, Calc and Numbers save the result of every formula next to the formula itself, and the viewer shows that saved result, with the cell’s number format applied. What you see is what the spreadsheet showed when the file was last saved. The formulas are not displayed and nothing is recomputed.
▶How do I switch between sheets?
When a workbook has more than one sheet, a sheet picker appears in the top-left corner of the view, listing every sheet by name with its position (for example 2/5). The workbook opens on the sheet that was active when it was saved. Hidden sheets are listed too, marked “(hidden)”. Chart sheets say that they hold a chart, which the viewer does not draw.
▶Is there a limit on how many rows are shown?
A sheet shows its first 10,000 rows and first 256 columns, and a very dense sheet can stop a little earlier, at the end of a row, once 150,000 filled cells are laid out. A note under the grid and the status line give the full size, for example “Showing the first 10,000 rows of 48,210”. Open the file in a spreadsheet app to see the rest.
▶How does it read my CSV file?
The delimiter (comma, semicolon, tab or pipe) is picked from the first lines of the file, and an Excel sep=; first line is honoured. The encoding is detected from the byte order mark, then UTF-8, with a fallback to Windows-1252; UTF-16 from Excel’s Unicode text export is read too. In a semicolon-separated file, decimal commas such as 3,14 count as numbers. Numbers are right-aligned, and a text header row above numeric data is set in bold and frozen. The subtitle names the delimiter and encoding that were used.
▶What happens with a password-protected workbook or an .xlsm with macros?
A workbook that needs a password to open is encrypted, so its cells cannot be read without that password; the viewer says so and explains how to remove the password in Excel and upload a copy. An .xlsm opens like any other workbook: its macro project is never read, interpreted or run.
▶Is this Excel viewer really free?
Yes, completely free. No signup, no watermarks, no file size limits on the viewer (the optional share-link feature has a 100 MB upload cap). Built by Innerscene as a tool for architects, engineers, and designers.
▶Are my files uploaded to a server?
No. All parsing, rendering, and conversion runs in your browser — nothing is uploaded, stored, or transmitted by default. The Share button is the only feature that uploads a file, and only when you explicitly click it.
▶Can I convert to another format?
A spreadsheet has no geometry to convert, so the Export menu offers images: click Export to save the current view of the sheet as a PNG or JPG, at the resolution you choose. The XLSX to PNG and CSV to PNG pages describe the same export.
▶Can I embed this viewer on my own site?
Yes. Click Embed in the toolbar to generate a one-line <iframe> snippet you can paste into any HTML page. You can choose whether the embed shows the viewer’s toolbar.
Microsoft Excel is a trademark of Microsoft Corporation. Numbers is a trademark of Apple Inc. Innerscene is not affiliated with either.