Convert to XLSX online

Free online converter for converting files to XLSX.

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videos or any files

Drag files here. Maximum size — 5 GB

How to convert files to XLSX?

1
Upload your file
Click the 'Choose File' button or drag and drop your file into the upload area. Supported formats include SQL, SQLITE, SQLITE3 and more.
2
Select the output format
Make sure XLSX is selected as the conversion format. Adjust additional settings if needed.
3
Start the conversion process
Click the 'Convert' button and wait a few seconds. All conversions are performed on our servers.
4
Download the result
Once the process is complete, click the 'Download' button and save the file in XLSX format.

Convert to XLSX: supported formats

database converter iconSQL to XLSXStructured Query Language to XLSXdocument converter iconPDF to XLSXPortable Document Format to XLSXspreadsheet converter iconXLS to XLSXMicrosoft Excel Spreadsheet to XLSXspreadsheet converter iconODS to XLSXOpenDocument Spreadsheet to XLSXspreadsheet converter iconCSV to XLSXComma-Separated Values File to XLSX

Convert XLSX to other formats

spreadsheet converter iconXLSX to PDFOffice Open XML Spreadsheet to PDFspreadsheet converter iconXLSX to HTMLOffice Open XML Spreadsheet to HTMLspreadsheet converter iconXLSX to ODTOffice Open XML Spreadsheet to ODTspreadsheet converter iconXLSX to CSVOffice Open XML Spreadsheet to CSV

.XLSX

XLSX
Office Open XML Spreadsheet
Data typeSpreadsheet document
MIME typeapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet
DeveloperMicrosoft (OOXML standardized via Ecma International and ISO/IEC)
Primary use casesSpreadsheets for analysis and reporting, budgeting, calculations with formulas, tables, charts, pivot tables, data exchange, and business documents

What is the XLSX file format?

XLSX is an Office Open XML spreadsheet file: a ZIP package of XML parts that stores workbooks, sheets, formulas, styles, and charts.

XLSX file characteristics

Data typeSpreadsheet document
MIME typeapplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Container formatOpen Packaging Conventions (OPC) ZIP package containing SpreadsheetML XML parts (workbook, worksheets, styles, shared strings, charts, relationships, and optional embedded resources)
Structure typeZIP package (OPC) with XML parts and relationship files (.rels)
MetadataPackage/core properties and application-specific metadata; may include authoring tool info, timestamps, and custom properties (tool-dependent)
Standard / SpecificationISO/IEC 29500 (Office Open XML) and ECMA-376; media type registered by IANA
Typical file sizeFrom a few KB (simple tables) to hundreds of MB or more (large datasets, images, many formulas, multiple sheets)
Max file sizeNo fixed format limit; practical limits depend on the application, available memory, and spreadsheet complexity
Year introduced2007

Advantages

The XLSX file format offers several advantages that make it suitable for common use cases.

  • Widely supported modern spreadsheet format;
  • Good fidelity for formulas, formatting, and charts;
  • ZIP-compressed package reduces size;
  • Works well with cloud collaboration tools;
  • Standardized as OOXML

Limitations

The XLSX file format has certain limitations that may affect its use in specific scenarios.

  • XLSX is typically macro-free (use .xlsm for VBA macros). Real-world interoperability depends on the producing app, OOXML conformance (Strict/Transitional), and supported feature set (e.g., some advanced Excel features may not round-trip perfectly in other software).

Compatibility

XLSX spreadsheets can be opened and edited using various spreadsheet applications.

  • Supported platforms: Microsoft Excel (Windows/macOS), LibreOffice, Google Sheets (import), Apple Numbers (import), many third-party libraries and viewers
  • Supported devices: Computers, tablets, and smartphones (via office apps or viewers)
  • Browser support: No
  • Mobile support: Yes
  • Cloud support: Yes
  • Backward compatibility: Yes

Security considerations

Treat XLSX as untrusted input: files may contain external links, embedded objects, or crafted content targeting parser vulnerabilities. Keep software updated and avoid opening unknown files in sensitive environments.

License

Open standard (ISO/IEC 29500 / ECMA-376); implementations may include vendor-specific extensions

XLSX is the standard Excel workbook format introduced with Microsoft Office 2007. Internally it is an OOXML (ISO/IEC 29500) Open Packaging Conventions ZIP container with SpreadsheetML XML files for workbook structure, worksheets, shared strings, styles, charts, and related resources. XLSX is typically macro-free (macros are stored in .xlsm).