SSL Verification Bypassed
The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.
Reason:
Hostname Mismatch - certificate is issued for *.google.com, *.appengine.google.com, *.bdn.dev, *.origin-test.bdn.dev, *.cloud.google.com, *.crowdsource.google.com, *.datacompute.google.com, *.google.ca, *.google.cl, not for spreadsheets.l.google.com
Open
Cached
·
just now
5
Headers
HTTP Security Headers
Status
Strict-Transport-Security
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Good
no-referrer
Permissions-Policy
Missing
Not configured
Recommendations
- • Add Strict-Transport-Security header with max-age of at least 1 year
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add X-Content-Type-Options: nosniff
- • Consider adding Permissions-Policy to control browser features
Performance Headers
No performance headers found
Caching Headers
No caching headers found
Content Headers
Content-Length
1561
Content-Type
text/html; charset=UTF-8
content-length: 1561 content-type: text/html; charset=UTF-8
Server Headers
No server headers found
CORS Headers
No CORS headers found
Cookies Headers
Other Headers
Alt-Svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
Date
Mon, 04 May 2026 11:11:37 GMT
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000 date: Mon, 04 May 2026 11:11:37 GMT
Recommendations
Enable compression (gzip/brotli) to improve performance
Add Cache-Control header to optimize caching