About ICS Tools

A free, privacy-focused online tool for converting calendar files between different formats.

What is ICS Tools?

ICS Tools is a free online tool that allows you to convert calendar files between various formats including ICS (iCalendar), CSV, and Excel. Whether you're migrating calendar events between different systems or need to work with calendar data in a specific format, our tools handle it all.

Key Features

🔒Privacy First

All conversions happen entirely in your browser. Your calendar data never leaves your device, ensuring complete privacy and security.

⚡Fast & Efficient

Instant conversions with no waiting time. Process thousands of events quickly with our optimized algorithms.

🆓Completely Free

No registration required, no hidden fees, no limitations. Use all features without any restrictions.

🎯Multiple Formats

Support for ICS, CSV, and Excel (.xlsx/.xls) formats with intelligent field mapping.

📱Mobile Friendly

Works perfectly on desktop, tablet, and mobile devices with a responsive design.

🌐Works Offline

Once loaded, the converter works offline, making it perfect for secure environments.

Supported Formats

Input Formats

  • 📅ICS/iCalendar files
  • 📄CSV files (various formats)
  • 📊Excel files (.xlsx, .xls)

Output Formats

  • 📅ICS format (universal compatibility)
  • 📄CSV (Excel/Google Sheets compatible)
  • 📊Excel (.xlsx) spreadsheets

Privacy & Security

Your privacy is our top priority. ICS Tools processes all files entirely within your web browser using client-side JavaScript. This means:

  • • Your calendar data never gets uploaded to our servers
  • • No data is stored, logged, or transmitted anywhere
  • • Works completely offline once the page is loaded
  • • No tracking, analytics, or data collection
  • • Open source and transparent processing

Technical Details

ICS Tools is built with modern web technologies to ensure reliability, performance, and compatibility:

  • • Built with Next.js and TypeScript for reliability
  • • Uses industry-standard parsing libraries
  • • Supports files up to 50MB for optimal performance
  • • Compatible with all modern browsers
  • • Responsive design for all device sizes

Questions or Feedback?

ICS Tools is designed to be simple and effective. If you have any questions, suggestions, or encounter any issues, we'd love to hear from you.

This tool is provided free of charge to help people manage their calendar data more effectively.