XLSXMicrosoft Excel (Office Open XML)
The Microsoft Excel workbook format since 2007. It holds one or more sheets with their numbers, dates, text and formulas.
Convert to
Excel and CSV converter
Go from Excel to CSV, CSV to Excel, JSON to CSV or ODS to XLSX. Sheets, numbers and dates are carried over (not the formatting), and your data stays on your computer.
- Files never uploaded
- Free, no sign-up
- No queue
XLSX504B030414000600
CSV4E6F6D3B4D6F6E74
The first bytes of a file often reveal its real format.
or drop them here. You can also paste an image (Ctrl+V).
Free · No sign-up · No upload
Files
These sample files are generated on the page. Convert them to try it out, or add your own.
Most used conversions
Supported formats
XLSMicrosoft Excel 97–2003
Excel’s old binary format (versions 97 to 2003). It still turns up in archives and older software; as XLSX it becomes lighter and more compatible.
Convert to
ODSOpenDocument Spreadsheet
The open spreadsheet format of LibreOffice Calc, the free counterpart of Excel’s XLSX.
Convert to
CSVComma-Separated Values
A plain text file where each line is a table row, with values separated by commas or semicolons. It is the most universal data exchange format.
Convert to
TSVTab-Separated Values
Like CSV, but with tabs as the separator, which avoids trouble when the data contains commas.
Convert to
JSONJavaScript Object Notation
The structured data format used by websites and apps (APIs). Both people and programs can read it.
Convert to
Frequently asked questions
Are Excel and CSV conversions really free?
Yes: no sign-up, no watermark and no limit on the number of files. The work happens on your device, so it costs us nothing in servers.
Are my files sent anywhere?
No. They are read and converted right in your browser. You can even go offline once the page has loaded: conversions you have used since the site’s last update keep working.
Is there a size limit?
A file’s size has no fixed limit: it depends on your device’s memory and on the browser. A few hundred MB work well on a recent computer. On a phone, stick to lighter files, especially for video. Most conversions read the whole file: beyond a certain size, often about 2 GB (less on a phone), the browser cannot read it in one block, and a message gives the file’s size.
A few caps still protect the browser’s memory, including: 1 GB of unpacked data for an archive or a Word, Excel, OpenDocument or EPUB file (512 MB on a phone and on some devices with little memory), 20,000 files per archive, 5 million filled cells per workbook, and 500 pages for a TIFF converted to PDF. A file over a cap is not converted, and a message says so.
Which browsers work?
The page is designed for recent versions of Chrome, Edge, Firefox and Safari. Video conversion (MP4, WEBM, MOV, MKV) uses WebCodecs, a feature of Chrome and Edge and of recent versions of Safari and Firefox (except Firefox for Android, which does not have it yet). A conversion the browser cannot do is refused with a message that says so.