AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I create an .ics calendar event file?

Fill in the event details in AnyTool's iCal Generator and it builds a standards-compliant .ics file live in your browser — with recurrence, reminders, attendees, and all-day or timed events. Download the .ics, copy it, or use the one-click add-to-Google/Outlook/Yahoo links. Nothing is uploaded.

  • RFC 5545 .ics with recurrence (RRULE) and reminders (VALARM)
  • All-day or timed events · attendees · organizer · status
  • One-click add to Google, Outlook, and Yahoo Calendar
  • 100% in your browser — no upload, no signup, works offline

What is

iCalendar (.ics)

iCalendar (.ics, RFC 5545) is the standard file format for calendar events. An .ics file describes one or more events — title, time, location, recurrence, reminders, and attendees — and imports into Google Calendar, Apple Calendar, and Outlook.

File Tools

Related terms

ICSVEVENTRRULEAdd to calendar

How to Create an .ics Calendar Event

Build an iCalendar event entirely in your browser.

30 secWeb browser
  1. 1

    Enter details

    Type the title, dates/times (or mark it all-day), location, and description. The .ics updates live.

  2. 2

    Add recurrence & reminders

    Set how the event repeats and add reminders, attendees, and status.

  3. 3

    Export

    Download the .ics, copy it, or use the add-to-Google/Outlook/Yahoo links.

Result: An .ics file or an add-to-calendar link

Frequently Asked Questions

Yes — AnyTool builds the .ics in your browser, so your event details never leave your device.

Generation is 100% client-side; nothing is uploaded to any server.

Yes — set daily/weekly/monthly/yearly recurrence and add one or more reminders.

Recurrence supports interval, specific weekdays, and an end (after N times or on a date); reminders can be minutes, hours, or days before the event.

Yes — the .ics is RFC 5545-compliant and imports into Google, Apple, and Outlook.

It writes correct UID, DTSTAMP, escaping, and 75-octet folding, and also offers one-click add-to-calendar links for Google, Outlook, and Yahoo.

Detailed Explanation

Methodology

How the iCal Generator Works

AnyTool builds the .ics string entirely in the browser per RFC 5545: a VCALENDAR wrapper with VERSION/PRODID, and one or more VEVENTs each carrying a UID, DTSTAMP, DTSTART/DTEND (all-day VALUE=DATE, or timed in UTC or floating local), SUMMARY/DESCRIPTION/LOCATION with proper TEXT escaping and 75-octet line folding, an RRULE for recurrence, VALARM reminders, and ORGANIZER/ATTENDEE/STATUS. It also builds add-to-calendar links for Google, Outlook, and Yahoo.

  • Runs client-side — event data is never uploaded
  • RFC 5545: escaping, 75-octet folding, UID + DTSTAMP
  • RRULE recurrence: interval, weekday (BYDAY), COUNT/UNTIL
  • Multiple VALARM reminders (minutes/hours/days before)
  • All-day or timed (UTC or floating); attendees + status
  • Multiple events in one .ics + add-to-calendar links
Privacy & Security

Privacy and Offline Use

Because the .ics is generated locally, event details never touch a server. The tool works offline after first load and requires no signup.

iCal generation: in-browser (AnyTool) vs typical online tools
CapabilityAnyToolTypical online .ics tools
Data handlingGenerated in your browserOften sent to / hosted on a server
Recurrence (RRULE)Full (interval/weekday/until)Often basic or none
Reminders (VALARM)MultipleOften one or none
Add-to-calendar linksGoogle/Outlook/YahooSometimes (often gated)
Cost / signupFree, no signupOften account-gated or watermarked

Capabilities reflect the live AnyTool tool; competitor behavior varies by service.