Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 54.148.192.94 |
| Server Software | nginx |
| Compression | gzip |
|
🔒 🟡 Mixed Content (3 HTTP resources) | The page is served over HTTPS but loads 3 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 54.148.192.94
Server Software nginx
Compression gzip
🔒 🟡 Mixed Content (3 HTTP resources) The page is served over HTTPS but loads 3 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Performance
| DNS Lookup | 151.6 ms |
| TCP Connect | 285.4 ms |
| TLS Handshake | 270.4 ms |
| Time To First Byte (TTFB) | 693 ms |
| Content Download | 0.2 ms |
| Total Response Time | 693.1 ms |
DNS Lookup 151.6 ms
TCP Connect 285.4 ms
TLS Handshake 270.4 ms
Time To First Byte (TTFB) 693 ms
Content Download 0.2 ms
Total Response Time 693.1 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Diigo - Better reading and research with annotation, highlighter, sticky notes, archiving, bookmarking & more. |
| Meta Description | Diigo is a powerful research tool and a knowledge-sharing community |
Title Diigo - Better reading and research with annotation, highlighter, sticky notes, archiving, bookmarking & more.
Meta Description Diigo is a powerful research tool and a knowledge-sharing community
Detected Technologies
| Technology | Google Analytics Nginx |
Technology Google Analytics Nginx
HTTP Headers
| Server
| nginx |
| Date
| Wed, 22 Jul 2026 11:00:29 GMT |
| Content-Type
| text/html; charset=UTF-8 |
| Transfer-Encoding
| chunked |
| Connection
| keep-alive |
| Status
| 200 OK |
| Cache-Control
| private, max-age=0, must-revalidate |
| X-Runtime
| 0.00141 |
| P3P
| CP="NOI DEVa TAIa OUR BUS UNI" |
| ETag
| W/"1ef8a638b3ab0dc36a6c01bcaa8f9638" |
| Content-Encoding
| gzip |
Meta Tags
| Content-Type | text/html; charset=utf-8 |
| Description | Diigo is a powerful research tool and a knowledge-sharing community |
| Viewport | width=device-width, initial-scale=1, maximum-scale=1 |
| X-XRDS-Location | https://www.diigo.com/openid?do=xrds |
Server nginx
Date Wed, 22 Jul 2026 11:00:29 GMT
Content-Type text/html; charset=UTF-8
Transfer-Encoding chunked
Connection keep-alive
Status 200 OK
Cache-Control private, max-age=0, must-revalidate
X-Runtime 0.00141
P3P CP="NOI DEVa TAIa OUR BUS UNI"
ETag W/"1ef8a638b3ab0dc36a6c01bcaa8f9638"
Content-Encoding gzip
