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ODS to Excel converter

Turn a LibreOffice or OpenOffice spreadsheet into an Excel .xlsx file. Every sheet comes across, and your file never leaves your browser.

Works with
ODSXLSX
Opens inExcelGoogle Sheets

Drop an .ods file here

An OpenDocument .ods spreadsheet, up to 100 MB. It stays on your computer.

  • No sign-up
  • Nothing uploaded
  • Every sheet kept
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What you get

Your Calc spreadsheet, ready for Excel.

  • Your file stays on your computer

    The .ods is read and the .xlsx is built in your browser. Nothing is sent to Mammoth or anyone else.

  • Every sheet, in order

    A spreadsheet with five sheets becomes an .xlsx with the same five, under the same names.

  • The data, not the formatting

    Text, numbers, dates and formula results come across. Formulas, colours and charts stay in the .ods.

How it works

How to convert ODS to Excel

Every value lands in the cell it had, on a sheet with the same name. Numbers stay numbers and dates stay dates.

  1. 1

    Add your .ods file

    Drop the file on the box or choose it. Files from LibreOffice Calc and OpenOffice work.

  2. 2

    Check the sheets

    A preview shows each sheet. Pick one from the menu to see the others.

  3. 3

    Download

    Save one .xlsx with every sheet, or one sheet on its own.

Your options

Other ways to do it

LibreOffice does this best if you have it open. Without it, the choice is between uploading the file and converting it here.

  • LibreOffice's Save As

    You have Calc and need the formatting

    • No software to installNo
    • Every sheet at onceYes
    • Keeps formulas and formattingYes
    • Nothing uploadedYes

  • Google Sheets

    Opening the file and downloading as .xlsx

    • No software to installYes
    • Every sheet at onceYes
    • Keeps formulas and formattingPartly
    • Nothing uploadedNo
  • This page

    This converter

    The data, without software or an upload

    • No software to installYes
    • Every sheet at onceYes
    • Keeps formulas and formattingNo
    • Nothing uploadedYes
In LibreOffice

How to save an ODS file as Excel in LibreOffice

If you have LibreOffice, Save As writes an .xlsx that keeps the formulas and formatting too.

Keep current format

This document may contain formatting or content that cannot be saved in the currently selected file format.

Use Excel 2007-365!Use ODF Format!

Need a CSV instead? The Excel to CSV converter reads .ods files too.

  1. 1

    Open the .ods in LibreOffice Calc.

  2. 2

    Go to File > Save As.

  3. 3

    Set the file type to Excel 2007-365 (.xlsx) and select Save.

  4. 4

    When Calc asks whether to keep the current format, select Use Excel 2007-365!

Your file stays private

The converter runs inside this page. Your spreadsheet is read and rebuilt as an .xlsx on your computer, and nothing is sent to Mammoth. That makes it safe for budgets, stock lists and anything with customer data in it.

How we handle your data

Once the page has loaded, it works with your internet switched off.

Every month

Getting the same spreadsheet every month?

Mammoth can take it from there. Save each month's file as .xlsx, put the files in a folder, and the rows are added to one table.

Try Mammoth free

Monthly reports

Auguststock-aug.xlsx
Septemberstock-sep.xlsx
Octoberstock-oct.xlsx
DriveDropboxOneDriveSFTP
All monthsUp to date
AugLisbon1,284
AugPorto962
SepLisbon1,310
SepPorto1,005
OctLisbon1,198

Illustration. Every new file in the folder is added to the same table.

Questions

ODS to Excel questions

What comes across to the Excel file?
Every visible sheet, in order, with its text, numbers, dates and TRUE/FALSE values. A formula gives its last calculated result. The formulas themselves, cell formatting, charts and macros are not copied. If you need those, use Save As in LibreOffice.
Does the layout stay the same?
Yes. Every value lands in the same cell it had in the .ods, so title rows, blank rows and notes under a table stay where they were. A merged cell is unmerged, with its value in the first cell.
Is my file uploaded anywhere?
No. The page reads the .ods and builds the .xlsx inside your browser. Once the page has loaded, it works with your internet switched off.
What happens to percentages and amounts?
They come across as plain numbers, so 12% becomes 0.12 and an amount with a currency sign loses the sign. Format the column in Excel to show them as a percentage or currency again.
Are dates still dates?
Yes. A date in Calc is written as a real Excel date, so it still sorts and filters as one.
Can Excel open an .ods file itself?
Yes. Current versions of Excel open .ods files with File > Open, and Save As then writes an .xlsx. This page is for when you do not have Excel, or want only the data.
What happens to hidden sheets?
They are left out. Every sheet you can see in Calc comes across, under its own name.
Can it open a password-protected .ods?
No. The page tells you when a file is protected. Open it in LibreOffice, remove the password, and try again.
Is it free?
Yes, with no account and no email.

More free tools

Free toolXLS to XLSXTurn an old .xls workbook into an .xlsx.Take a lookFree toolExcel to CSVSave one sheet or every sheet as CSV.Take a lookFree toolMerge Excel filesCombine several workbooks into one.Take a look