SheetJS Community Edition + Basic Cell Styles

Microsoft backed, Excel advanced xlsx workbook generation JavaScript library

SimpleXML is a simple, easy to use Simple non complex XML, XLSX, XLS & CSV Documents manipulation program.

A high-performance converting tool that helps you view a XLSX file on Browser.

Export xlsx data using jquery javascript

Easy way to convert Excel file to CSV and CSV to Excel with GUI using python.

Mahat Certification Project, using C#, Angular and SQL server

Symfony/SonataAdmin export for Excel(.xlsx)

angular.io app simulating an Excel sheet

Simple and easy to use DTB to XLSX (and CSV) format converter.

A Cross-Platform Desktop app to combine multiple CSV files into a single CSV / XLSX File

Excel Comparison Tool for comparing czech companies data (business ID, business address) with ARES (official business register)

TextFieldParser によるCSV読み込み、ClosedXML によるxlsx 出力のサンプル

A web-based QR code attendance tracking system built with Vanilla JavaScript, HTML, and CSS. It allows scanning of QR codes via camera or image upload, logs attendance with timestamps, and provides an option to download the attendance list as an Excel file.

A WPF application that bulk extracts data from a directory of XLSX files.