iCal Sandbox

iCal Feed Validator

Validate your iCal / .ics feed for RFC 5545 compliance, booking overlaps, and hospitality best practices. Perfect for BnB owners, property managers, and PMS developers.

We fetch the URL server-side. No CORS issues. Your feed URL is not stored.

What we check

RFC 5545 Compliance

  • VCALENDAR container & VERSION
  • PRODID identification
  • Line endings (CRLF)
  • Event UIDs & uniqueness
  • DTSTAMP properties
  • Date ordering (start < end)

Hospitality Checks

  • Booking overlaps & double bookings
  • Same-day turnovers
  • Missing event summaries
  • Ongoing / open-ended bookings
  • Past vs future event balance
  • Average stay duration

Feed Health (URL only)

  • Content-Type: text/calendar
  • HTTPS encryption
  • Response time
  • Cache-Control headers
  • Character encoding