Excel Merge Tool (ZIP → Single Excel)

A simple, browser-based JavaScript tool that allows you to upload a ZIP file containing multiple Excel (.xlsx) files and merge all sheets into one combined Excel file — no backend, no server, no installation required.

---

🚀 Features

• 📦 Upload a ZIP file containing multiple .xlsx files
• 📄 Reads all Excel files inside the ZIP
• 📑 Processes all sheets from each Excel file
• 🧩 Merges data into a single sheet
• 🏷️ Keeps headers only once
• 🌐 100% client-side (runs in browser)
• ⚡ Fast & lightweight

---

🛠️ Built With

• HTML5
• Vanilla JavaScript
• JSZip – for ZIP file handling
• SheetJS (xlsx) – for Excel file processing

---

📂 How It Works

1. Upload a .zip file
2. The tool extracts all .xlsx files from the ZIP
3. Reads each sheet inside every Excel file
4. Merges rows into one Excel sheet
5. Downloads the final merged Excel file automatically

---

▶️ Usage

1. Clone the repository:

   git clone https://github.com/your-username/excel-merge-from-zip.git