What does "Couldn't sign you in. This browser or app may not be secure" mean? Google Error Explained
Quick answer: Google is blocking sign-in because it detects your browser or app as insecure. This usually happens with outdated browsers, certain apps, or when Google detects suspicious activity.
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Google is blocking sign-in because it detects your browser or app as insecure. This usually happens with outdated browsers, certain apps, or when Google detects suspicious activity.
1Why you're seeing "Couldn't sign you in. This browser or app may not be secure" on Google
- Outdated browser version
- Browser security settings too restrictive
- Google detected suspicious sign-in attempts
- Using unsupported browser or app
- VPN or proxy triggering security
- Cookies or JavaScript disabled
2How to fix "Couldn't sign you in. This browser or app may not be secure" error on Google
Update your browser to the latest version (Chrome, Firefox, Edge, Safari).
Enable cookies and JavaScript in browser settings.
Clear browser cache and cookies.
Try signing in from an incognito/private window.
Disable VPN or proxy temporarily.
Try a different browser.
Check if your Google account is locked: accounts.google.com/security.
Wait 24 hours if Google temporarily blocked sign-in due to suspicious activity.
How long will "Couldn't sign you in. This browser or app may not be secure" error last?
Usually resolved immediately after browser update or clearing cache. Security blocks may take 24 hours to clear.
Frequently asked questions about "Couldn't sign you in. This browser or app may not be secure"
Why does Chrome say it's not secure?
Even Chrome can trigger this if it's outdated, has security extensions blocking Google, or Google detected suspicious activity from your IP.
Can I use a different browser?
Yes, try Firefox, Edge, or Safari. If all browsers fail, it may be a Google account security issue rather than browser problem.
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Summary: Couldn't sign you in. This browser or app may not be secure on Google
The error message "Couldn't sign you in. This browser or app may not be secure" on Google typically means: Google is blocking sign-in because it detects your browser or app as insecure. This usually happens with outdated browsers, certain apps, or when Google detects suspicious activity.
This is a high severity issue that usually occurs due to outdated browser version. To fix this, update your browser to the latest version (chrome, firefox, edge, safari).
Usually resolved immediately after browser update or clearing cache. Security blocks may take 24 hours to clear.
If you're still experiencing this google error after trying these steps, check out our related error message guides or search for more specific solutions.