Add to Calendar buttons let website visitors and email recipients save your event to Google Calendar, Apple Calendar, Outlook, or Yahoo in one click. Here are the leading tools:

AddEvent - the market leader

The most widely used Add to Calendar service on the internet, trusted by 400,000+ companies since 2012. Generates buttons for websites, links for emails, hosted landing pages, and QR codes. Works across all major calendar platforms. Includes analytics, RSVP forms, embeddable calendar widgets, and subscription calendars. Free plan available; paid from $29/month.

Best for: businesses and marketing teams wanting a complete calendar engagement platform.

Addevent.com direct URL method (Dynamic)

AddEvent also offers a Dynamic Add to Calendar button where event details are passed as URL parameters - ideal for appointment confirmation pages where every user has a unique event.

Manual .ics file

Generate an iCalendar (.ics) file and offer it as a download link. Free, no third-party dependency, but requires technical setup and cannot be updated after distribution.

Best for: developers who want zero external dependency and have a simple one-time event.

Google Calendar add event links

Google provides a direct URL structure to add events to Google Calendar only. Free and simple but only works for Google - does not cover Apple, Outlook, or Yahoo.

Best for: audiences that are 100% Google Calendar users.

What to look for

• Support for all major calendar platforms in one button
• Analytics to track how many people clicked Add to Calendar
• Customization to match your brand
• Embeddable on any website and in emails
• No attendee account or app download required