Yes, with no watermark and no page limit.

Does it need an account?

No. There is no account system.

Is my file processed on my device?

Yes. The file is read by your browser and never uploaded. There is no server to send it to.

What formats are supported?

XLSX and XLSM in. A sheet can be saved out as CSV. Older .xls files are a different format and are refused by name rather than as a broken zip.

The whole workbook is read. The first 2,000 rows and 200 columns of a sheet are drawn, because laying out more than that freezes a browser tab, and the CSV holds everything.

Does it work on mobile?

Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.

Does it work offline?

Yes, once the page has loaded. The tool keeps working with no network connection.

Can I open an old .xls file here?

No, and it says so rather than complaining that the file is corrupt. A .xls is a compound binary document from before 2007 and shares nothing with .xlsx but three letters of its name. Open it in Excel, LibreOffice or Google Sheets once and save it as .xlsx, and this page reads it.

Why is my date showing as 2023-03-15 when I typed 15/03?

Because that is what the file contains. Excel stores a date as a count of days and remembers separately how you wanted it displayed. This reader converts the number to a real date and shows it in the one order that cannot be misread, which matters when the file came from somewhere that writes month first.

My formulas are gone. Where did they go?

You are seeing the answers, which is what a viewer should show. Every formula cell in the file also stores the result Excel last calculated, and that is the number on screen. If a cell is blank where a total should be, the file was written by something that never calculated it, which Excel itself fixes on open and a reader cannot.

Can this edit the spreadsheet?

No. It reads, searches and hands back a CSV of a sheet. Nothing is written over the file you opened, and closing the tab leaves no copy anywhere. To change the data, take the CSV, edit it, and use the CSV to Excel tool to write a new workbook.

Drop an Excel file hereor choose one from this deviceChoose fileXLSX and XLSM · never uploaded · every sheet in the workbook

LocalThe workbook is unzipped and read on this device. Nothing is uploaded, which is the point when the spreadsheet is a payroll file or a customer list.

XLSX -> READABLE · Local tool

Excel Viewer

Open an Excel workbook, read every sheet, search it, and save a sheet as CSV.

Last updated 10 September 2026

How do I open an Excel file without Excel?

Open it in a browser tab. filetity's Excel viewer unzips the .xlsx on your own device and reads the sheets out of it, so no account, no licence and no upload is involved, and the file is not changed or copied anywhere. Every sheet in the workbook gets a tab, the search box filters rows while keeping their original row numbers so you can find them again in Excel, and any sheet can be saved as a CSV. Dates come back as real dates rather than the five-digit numbers the format stores, and formula cells show the value the spreadsheet last calculated. Older .xls files are a different format and need saving as .xlsx first.

01 / Your device
the file stays here
02 / Browser memory
the work runs locally
03 / Back to you
saved on this device

When you would use this

Situations, not settings.

A spreadsheet arrived and there is no Excel on this machine: A borrowed laptop, a fresh install, or a phone. The workbook opens in the browser tab with every sheet, and nothing needs installing or signing into.
Checking a file before sending it on: Hidden sheets, a stray tab of working notes, or a column of personal data left in at the far right. All of it is visible here, including sheets that were never the active one.
Finding one row in a file with forty thousand of them: Search filters the sheet and keeps the original row numbers, so the row can be found again in the real spreadsheet afterwards.

How it works / no cloud

A conversion engine, not an upload form.

An .xlsx is a zip of XML files, so the browser unzips it and reads the sheets out. Three things in that format are where other readers get it wrong, and they are handled here. Text is stored once in a shared table and referenced by number, so a cell holding a word is really a pointer. A date is a plain number, and whether it is a date at all depends on the style the file attaches to that cell, which is a lookup through two more files. A formula cell stores both the formula and the value Excel last calculated, and the value is what you saw, so that is what is shown. Nothing is sent anywhere and nothing is written back over your file.

Offline ready
Installable app
No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?: Yes, with no watermark and no page limit.
Does it need an account?: No. There is no account system.
Is my file processed on my device?: Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?: XLSX and XLSM in. A sheet can be saved out as CSV. Older .xls files are a different format and are refused by name rather than as a broken zip.
What are the limits?: The whole workbook is read. The first 2,000 rows and 200 columns of a sheet are drawn, because laying out more than that freezes a browser tab, and the CSV holds everything.
Does it work on mobile?: Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?: Yes, once the page has loaded. The tool keeps working with no network connection.
Can I open an old .xls file here?: No, and it says so rather than complaining that the file is corrupt. A .xls is a compound binary document from before 2007 and shares nothing with .xlsx but three letters of its name. Open it in Excel, LibreOffice or Google Sheets once and save it as .xlsx, and this page reads it.
Why is my date showing as 2023-03-15 when I typed 15/03?: Because that is what the file contains. Excel stores a date as a count of days and remembers separately how you wanted it displayed. This reader converts the number to a real date and shows it in the one order that cannot be misread, which matters when the file came from somewhere that writes month first.
My formulas are gone. Where did they go?: You are seeing the answers, which is what a viewer should show. Every formula cell in the file also stores the result Excel last calculated, and that is the number on screen. If a cell is blank where a total should be, the file was written by something that never calculated it, which Excel itself fixes on open and a reader cannot.
Can this edit the spreadsheet?: No. It reads, searches and hands back a CSV of a sheet. Nothing is written over the file you opened, and closing the tab leaves no copy anywhere. To change the data, take the CSV, edit it, and use the CSV to Excel tool to write a new workbook.

Keep working locally

3 available · more coming