The Excel File Merger App is a free, open-source web tool that allows you to effortlessly merge multiple Excel (.xlsx) files contained in a ZIP archive into a single downloadable file. Built using Python with Streamlit, Pandas, and Openpyxl, this lightweight application simplifies the tedious task of combining spreadsheet data from multiple sources.

Simply upload a ZIP file containing your Excel sheets, and the app will extract and merge all .xlsx files into one unified dataset. You can then download the merged result as either CSV or Excel format with just one click.

Ideal for data analysts, researchers, and business professionals who frequently deal with batch Excel processing, this tool eliminates manual copy-pasting and ensures fast, accurate results.