BigCSV – Fast CSV Processing Tool for Large Files

I built BigCSV as a modern solution for processing large CSV files (GB-level) with complete privacy protection. Key features:

Lightning fast processing with Web Workers 100% client-side - data never leaves your browser Built-in data analysis and visualization Export to multiple formats (CSV, JSON, Excel, HTML, Markdown, PDF) Smart encoding detection (UTF-8, GBK, Big5, etc.) Virtual scrolling for millions of rows Customizable themes and branding

Built with Next.js 14, TypeScript, and modern web technologies. Perfect for data analysts, developers, and anyone who needs to work with large CSV files without compromising privacy.

Try it at https://www.bigcsv.online/tool - upload any CSV file and see the magic happen!