# iCal Tester

> Free online tool for testing and validating iCal/ICS calendar feeds
> for vacation rental platforms and PMS integrations.

## Links

- Homepage: https://icaltester.com/
- Sign Up (Free): https://icaltester.com/auth
- Guides Hub: https://icaltester.com/guides
- Airbnb Guide: https://icaltester.com/guides/airbnb-ical-not-syncing
- Booking.com Guide: https://icaltester.com/guides/booking-com-calendar-sync-test
- RFC-Aware Validator Guide: https://icaltester.com/guides/ical-rfc-5545-validator
- Privacy Policy: https://icaltester.com/privacy
- Contact: https://icaltester.com/contact
- Full Documentation: https://icaltester.com/llms-full.txt

## What is iCal Tester?

iCal Tester validates iCalendar feeds with an RFC-aware, behavior-first
workflow and helps developers test calendar synchronization with
Booking.com, Airbnb, VRBO, and other OTA platforms.

## Key Features

- Validate iCal/ICS feeds through real import and sync behavior
- Test calendar sync between vacation rental platforms
- Detect booking conflicts and double bookings
- Create mock calendars for integration testing
- Visual timeline view for comparing multiple calendars
- Debug channel manager and PMS integrations

## Primary Use Cases

1. **Test Booking.com Calendar Sync**: Import your Booking.com iCal
   export and compare it against mock calendars to prevent double bookings.

2. **Debug Airbnb iCal Exports**: Troubleshoot why your Airbnb calendar
   isn't syncing and validate how the imported feed behaves.

3. **Channel Manager Testing**: Verify your PMS correctly reads and
   writes iCal data across multiple OTA channels.

4. **RFC-Aware Validation**: Check whether your calendar feeds can be
   imported, synced, and translated into the blocked dates you expect.

## Public Guides

- **Airbnb iCal Not Syncing?** Debug cache delays and import issues:
  https://icaltester.com/guides/airbnb-ical-not-syncing

- **How to Test Booking.com Calendar Sync**:
  https://icaltester.com/guides/booking-com-calendar-sync-test

- **RFC-Aware iCal Validator Workflow**:
  https://icaltester.com/guides/ical-rfc-5545-validator

## Who Uses This?

- PMS developers
- Channel manager integration engineers
- Vacation rental property managers
- Support and operations teams validating calendar feeds

## Technical Details

- Format: iCalendar / ICS / RFC 5545-oriented workflows
- Parser behavior: folded lines, VEVENT extraction, basic diagnostics,
  floating datetimes treated as UTC, no RRULE expansion
- Platforms: Booking.com, Airbnb, VRBO, Expedia, Google Calendar
- Pricing: Free tier available, no credit card required
- Stack: React, TypeScript, Supabase

## Contact

- Website: https://icaltester.com
- Contact: https://icaltester.com/contact
- Developer: Globecom (https://globecom.nl)