xlsxwriter.swift: A wrapper in Swift around Libxlsxwriter for creating Excel XLSX files.

import xlsxwriter

// Create a new workbook and add a worksheet.
var wb = Workbook(name: "demo.xlsx")
defer { wb.close() }
let ws = wb.addWorksheet()

// Add a format.
let format = wb.addFormat()

// Set the bold property for the format 

// Write some simple text. 
ws.write(.string("Hello"), (0, 0))

// Text with formatting.
ws.write(.string("World"), (0, 1), format: format)

The libxlsxwriter library

Libxlsxwriter is a C library that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file.

It supports features such as:

  • 100% compatible Excel XLSX files.
  • Full Excel formatting.
  • Merged cells.
  • Defined names.
  • Autofilters.
  • Charts.
  • Data validation and drop down lists.
  • Conditional formatting.
  • Worksheet PNG/JPEG images.
  • Cell comments.
  • Support for adding Macros.
  • Memory optimization mode for writing large files.
  • Source code available on GitHub.
  • FreeBSD license.
  • ANSI C.
  • Works with GCC, Clang, Xcode, MSVC 2015, ICC, TCC, MinGW, MingGW-w64/32.
  • Works on Linux, FreeBSD, OpenBSD, OS X, iOS and Windows. Also works on MSYS/MSYS2 and Cygwin.
  • Compiles for 32 and 64 bit.
  • Compiles and works on big and little endian systems.
  • The only dependency is on zlib.


  • Swift Tools 5.3.0
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Last updated: Mon Oct 25 2021 02:52:43 GMT-0500 (GMT-05:00)