libxlsxwriter

A C library for creating Excel XLSX files.

The libxlsxwriter library

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

It supports features such as:

• 100% compatible Excel XLSX files
• Full Excel formatting
• Memory optimisation mode for writing large files
• Source code available on GitHub
• FreeBSD license
• ANSI C
• Works with GCC 4.4, 4.6, 4.7, 4.8, tcc and clang
• Works on Linux, FreeBSD and OS X.
• The only dependency is on zlib

Here is an example that was used to create the spreadsheet shown above:

#include "xlsxwriter.h"

int main() {

    /* Create a new workbook and add a worksheet. */
    lxw_workbook  *workbook  = new_workbook("demo.xlsx");
    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);

    /* Add a format. */
    lxw_format    *format    = workbook_add_format(workbook);

    /* Set the bold property for the format */
    format_set_bold(format);

    /* Widen the first column to make the text clearer. */
    worksheet_set_column(worksheet, 0, 0, 20, NULL, NULL);

    /* Write some simple text. */
    worksheet_write_string(worksheet, 0, 0, "Hello", NULL);

    /* Text with formatting. */
    worksheet_write_string(worksheet, 1, 0, "World", format);

    /* Writer some numbers. */
    worksheet_write_number(worksheet, 2, 0, 123,     NULL);
    worksheet_write_number(worksheet, 3, 0, 123.456, NULL);

    workbook_close(workbook);

    return 0;
}

See the full documentation for the getting started guide, a tutorial, the main API documentation and examples.