Sync your Outlook and Google calendars
Clone or download
Latest commit 6d2c1d4 Jan 6, 2019
Type Name Latest commit message Commit time
Failed to load latest commit information.
docs Update Jan 6, 2019
src v2.7.7 Nov 25, 2018 v2.7.7 Nov 25, 2018 Add files via upload May 20, 2017
nuget-build.bat v2.7.7 Nov 25, 2018
nuget.exe v2.6.1 Aug 23, 2017

Outlook Google Calendar Sync

Offers calendar synchronisation between Outlook and Google, including attendees and reminders.
Completely free, no install necessary, works behind web proxies and actively developed.

🚨 Not using OGCS yet? Get started over on the user site. 🚨

Continually Improving

A lot of work has gone in to this project.
If you would like to support me and further development of this tool, please donate
If you find a bug, help squash it! 🐞

Downloads & Statistics

⚙️ See the wiki for install, configuration guides and more.

Latest Beta Release: Latest Release Latest Release downloads

💾 Installer

📦 Portable ZIP

ℹ️ Upgrades to this release

Latest Alpha Release: Latest Release Latest Release downloads

💾 Installer

📦 Portable ZIP

ℹ️ Upgrades to this release


Supported configurations

  • Supports all versions of Outlook from 2003 to 2016 64-bit!
  • Installable and portable options - even runs from a USB thumbdrive
  • Synchronises items in any calendar folder, including those shared with you, from
    • Outlook ➡️ Google
    • Outlook ⬅️ Google
    • Outlook ↔️ Google (two-way/bidirectional sync)
    • ⚙️ See diagram on the right for supported configurations.
      New with v2.7.6 - now supports all configurations!
  • Includes the following event attributes:
    • Subject
    • Description
    • Location
    • Attendees (including whether required or optional)
    • Reminder events
    • Availability (free/busy)
    • Privacy (public/private)
  • Differential comparison updates only attributes that have changed
  • Customisable date range to synchronise, past and future
  • Frequency of automatic syncs, including push-sync from Outlook
  • Configurable proxy settings, or use Internet Explorer's
  • Merge new events into existing on destination calendar
  • Prompt on deletion of items
  • Ability to obfuscate custom words for privacy/security
  • Option to force items as private in target calendar
  • Syncs recurring items properly as a series
  • Can run unobtrusively in the system tray, with bubble notifications on sync
  • Application can start on login, with delay if required


Screenshot1 Screenshot2 Screenshot3

Previous Codeplex Project site.