Whenever you click "Sign in with Google" on a new productivity tool, online game, or mobile app, you grant that company specific API permissions (OAuth tokens) to access portions of your Google profile. Over several years, dozens of abandoned services retain background access to your email metadata, contact lists, or cloud files without your knowledge.
Auditing and revoking stale third-party permissions is one of the most effective ways to harden your Google Account security against data breaches and unauthorized scraping.
1. How to View All Connected Third-Party Apps
- Open your browser and go to myaccount.google.com/connections (or navigate to Google Account > Security > Your connections to third-party apps & services).
- Click See all connections to view the full inventory of connected platforms.
- Review the categorized connection list:
- Has access to: Apps with full or partial access to specific data (e.g., Google Drive, Calendar, Contacts).
- Sign in with Google: Apps using Google purely as a federated identity provider.
2. Inspect Permission Scopes and Risk Levels
Click on individual applications to inspect their exact privileges:
- Low Risk: Apps that only receive your Name, Email Address, and Profile Picture.
- High Risk: Apps that request permission to "Read, compose, send, and permanently delete all your email from Gmail" or "See, edit, create, and delete all of your Google Drive files".
If you no longer use the software or do not recognize the developer, the token should be revoked immediately.
3. How to Revoke Third-Party App Access
- In the connection detail pane, scroll down to the bottom.
- Click Delete all connections you have with [App Name] (or Stop using Sign in with Google).
- Confirm the deletion prompt.
- Google will instantly invalidate the OAuth authentication token. The external company can no longer query your Google servers for new data.
4. Audit Chrome Browser Extensions Access
Certain Chrome extensions request elevated permissions to read page content and communicate with Google web apps:
- In Google Chrome, click the Three Dots Menu > Extensions > Manage Extensions (or type
chrome://extensions). - Remove any suspicious or outdated add-ons that have not received developer updates in over 12 months.