Excel (XLSX) Converter
Convert XLSX spreadsheet files to PDF, ODS, CSV, HTML, Markdown and Text and 3 more formats — free, in batches, files up to 10 GB, with no sign-up and no watermark.
Drop your XLSX file
Choose the format you need
Download the result
Choose file
or drag & drop — document, spreadsheet or presentation files
Free · Unlimited · No sign-up · Max 10 GB
Your privacy is our mission. Most files are converted right in your browser and never leave your device. Only large files, or formats a browser cannot process, are sent to our server over an encrypted connection — they are never stored, never shared, and deleted as soon as your download is ready.
What Is an XLSX File?
XLSX is the Excel workbook format: several sheets, formulas, number formats and charts in one file. It is what accountants, analysts and most business systems exchange. XLSX is a format rather than a compression method — zipped XML with sheets, formulas and formatting. What is inside decides the quality.
XLSX Facts
| Full name | Microsoft Excel Workbook (Office Open XML) |
|---|---|
| File extension | .xlsx |
| Type | Spreadsheet |
| How it stores data | Zipped XML with sheets, formulas and formatting |
| Created by | Microsoft, 2007 |
| Best for | spreadsheets with formulas, several sheets or formatting |
| Watch out | programs and scripts that expect plain data usually want CSV |
| Opens with | Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers |
How to Open an XLSX File
A .xlsx file opens with Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers. If none of those is at hand — or the file has to go into a program, device or website that refuses XLSX — convert it: PDF, ODS and CSV are the usual choices.
Convert XLSX to Another Format
Convert Other Formats to XLSX
XLSX Compared
Frequently Asked Questions
What is an XLSX file?
XLSX is the Excel workbook format: several sheets, formulas, number formats and charts in one file. It is what accountants, analysts and most business systems exchange.
How do I open a .xlsx file?
With Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers. If your device or program does not accept it, convert the file to a format it does.
How do I convert an XLSX file?
Drop the file into the converter on this page, choose the target format — PDF, ODS, CSV, HTML and Markdown and others — and press Convert. It is free, there is no account and several files can be converted at once.
Is XLSX lossy or lossless?
XLSX is a format rather than a compression method — zipped XML with sheets, formulas and formatting. What is inside decides the quality.
What is XLSX good for, and what are its limits?
Best for: spreadsheets with formulas, several sheets or formatting. Watch out: programs and scripts that expect plain data usually want CSV.
Is the XLSX converter free, and how big can the files be?
It is free, with no account, no watermark and no daily limit. Files can be up to 10 GB each.
Which formats can be converted to XLSX?
ODS and CSV.