Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 185.199.108.153 |
| Server Software | GitHub.com |
| CDN | CDN (HIT) |
| Compression | gzip |
|
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 185.199.108.153
Server Software GitHub.com
CDN CDN (HIT)
Compression gzip
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 | 29 ms |
| TCP Connect | 29.9 ms |
| TLS Handshake | 5.9 ms |
| Time To First Byte (TTFB) | 38 ms |
| Content Download | 0.3 ms |
| Total Response Time | 38.3 ms |
DNS Lookup 29 ms
TCP Connect 29.9 ms
TLS Handshake 5.9 ms
Time To First Byte (TTFB) 38 ms
Content Download 0.3 ms
Total Response Time 38.3 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 | Semantic Versioning 2.0.0 | Semantic Versioning |
| Meta Description | Semantic Versioning spec and website |
| Canonical | https://semver.org/ |
| Open Graph Title | Semantic Versioning 2.0.0 |
| Open Graph Description | Semantic Versioning spec and website |
| Twitter Card | summary |
| Twitter Title | Semantic Versioning 2.0.0 |
Title Semantic Versioning 2.0.0 | Semantic Versioning
Meta Description Semantic Versioning spec and website
Canonical https://semver.org/
Open Graph Title Semantic Versioning 2.0.0
Open Graph Description Semantic Versioning spec and website
Twitter Card summary
Twitter Title Semantic Versioning 2.0.0
Detected Technologies
| Technology | Google Analytics Node.js |
Technology Google Analytics Node.js
HTTP Headers
| Server
| GitHub.com |
| Content-type
| text/html; charset=utf-8 |
| Last-modified
| Mon, 29 Jun 2026 09:03:28 GMT |
| Access-control-allow-origin
| * |
| Etag
| W/"6a4234e0-797e" |
| Expires
| Mon, 29 Jun 2026 09:19:47 GMT |
| Cache-control
| max-age=600 |
| Content-encoding
| gzip |
| X-proxy-cache
| MISS |
| X-github-request-id
| 77F0:8A57E:57C56E8:58A60D1:6A42365A |
| Accept-ranges
| bytes |
| Date
| Wed, 22 Jul 2026 01:15:50 GMT |
| Via
| 1.1 varnish |
| Age
| 237 |
| X-served-by
| cache-par-lfpg1960077-PAR |
| X-cache
| HIT |
| X-cache-hits
| 1 |
| X-timer
| S1784682950.230515,VS0,VE1 |
| Vary
| Accept-Encoding |
| X-fastly-request-id
| 1d0af1234d21b03ce68d26ad624fe6d9d3d51c67 |
| Content-length
| 9110 |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0 |
| Generator | Jekyll v3.10.0 |
| Author | Tom Preston-Werner |
| Description | Semantic Versioning spec and website |
Server GitHub.com
Content-type text/html; charset=utf-8
Last-modified Mon, 29 Jun 2026 09:03:28 GMT
Access-control-allow-origin *
Etag W/"6a4234e0-797e"
Expires Mon, 29 Jun 2026 09:19:47 GMT
Cache-control max-age=600
Content-encoding gzip
X-proxy-cache MISS
X-github-request-id 77F0:8A57E:57C56E8:58A60D1:6A42365A
Accept-ranges bytes
Date Wed, 22 Jul 2026 01:15:50 GMT
Via 1.1 varnish
Age 237
X-served-by cache-par-lfpg1960077-PAR
X-cache HIT
X-cache-hits 1
X-timer S1784682950.230515,VS0,VE1
Vary Accept-Encoding
X-fastly-request-id 1d0af1234d21b03ce68d26ad624fe6d9d3d51c67
Content-length 9110
