Csv To Excel Converter

Here's a great Chrome Web Store description you can copy-paste:

CSV to Excel Converter is a fast, free, and fully offline Chrome extension that converts your CSV files into properly formatted Excel (.xlsx) files — right in your browser, with zero data upload.
✨ Key Features:
🔒 100% Private & Offline — Your files never leave your device. All conversion happens locally in your browser with no servers, no cloud, and no internet connection required.
⚡ Instant Conversion — Drop your CSV file and get a ready-to-open Excel file in seconds. No waiting, no sign-up, no account needed.
📦 Batch Conversion with ZIP Download — Upload multiple CSV files at once. They'll all be converted and bundled into a single ZIP file for easy download.
🖱️ Drag & Drop Support — Simply drag your CSV files onto the extension or click to browse. Clean, simple, and intuitive interface.
📊 Preserves Your Data — Numbers, text, and special characters are all handled correctly. Your data comes out exactly as it went in.
🆓 Completely Free — No subscriptions, no premium tiers, no hidden fees.
How to use:

Click the extension icon in your Chrome toolbar
Drag & drop your CSV file(s) or click "Browse files"
Click "Convert to Excel" — your file downloads instantly!

Built by Dhruv Savaliya with privacy and simplicity in mind.