How to get a .ics URL for your calendar

How to publish or find the .ics URL for your Outlook, Google, Fastmail, or Proton calendar so you can use it as a source calendar in CalendarBridge.

C Chad Updated October 23, 2025 6 min read

General notes about .ics URLs

An ICS url should end with “.ics”

To test whether an ICS URL is working, when you paste it into the address bar of your browser and hit enter, it should trigger a download of a text file with a .ics extension.

If your .ics URL begins with “webcal://” change that to “https://”

Outlook calendar

In Calendar settings, you can publish your calendar so anyone can view your calendar or subscribe to it.

  1. In Calendar view, select Settings > View all Outlook settings.
  2. Select Calendar > Shared calendars.
  3. Under Publish a calendar, choose which calendar you want to publish and how much detail people can see.
  4. Select Publish.
  5. If you choose an HTML link, recipients can copy and paste the URL in a browser to view your calendar in a new browser window. If you choose an ICS link, recipients can download the ICS file and import it into Outlook. This will add your events into their calendar, but recipients won’t automatically receive any updates to your calendar. Alternatively, recipients can use the ICS link to subscribe to your calendar through Outlook. They’ll see your calendar alongside their own and will automatically receive any updates to your calendar.

Once you have the ICS URL, here is how to setup a sync connection with an ICS URL

Google calendar

  1. On your computer, open Google Calendar.
  2. In the top right, click Settings > Settings.
  3. On the left panel, under “Settings for my calendars,” click the name of the calendar you want to use.
  4. Click Integrate calendar.
  5. In the “Secret address in iCal format” section, copy the link.
  6. Paste the link as directed by your other calendar application.

Once you have the ICS URL, here is how to setup a sync connection with an ICS URL

Fastmail calendar

  1. Open the Settings → Calendars screen.
  2. Find the calendar in the list and click the Edit & share button.
  3. Find the Publish section and click the toggle button next to Full event details or Free/busy information, depending on what information you wish to share.
  4. A URL will be shown. You can copy this URL and give it to the people you wish to share your calendar data with. The URL will become active as soon as you click Save.

Once you have the ICS URL, here is how to setup a sync connection with an ICS URL

Protonmail calendar

  1. Log in to Proton Calendar at calendar.proton.me.
  2. Click Settings → All settings → Calendars, then select the calendar you wish to share. Or you can click the Settings icon next to the calendar.
  3. Scroll to Share with anyone and select Create link.
  4. Choose what those sharing your calendar will see:
    • Limited view: Shows when you’re busy but doesn’t show any event details.
    • Full view: Shows all the event details on your calendar to anyone with the link, including:
      • Title of the event and event description
      • Event participants
      • Location of the event
  5. Proton Calendar will generate a URL link for your calendar. Click Copy link and share it (for example, by pasting it into an email or using it as a hyperlink on your website).

Once you have the ICS URL, here is how to setup a sync connection with an ICS URL