Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 185.199.109.153 |
| 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 185.199.109.153
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 | 1.2 ms |
| TCP Connect | 2 ms |
| TLS Handshake | 5.4 ms |
| Time To First Byte (TTFB) | 122 ms |
| Content Download | 0.1 ms |
| Total Response Time | 122 ms |
DNS Lookup 1.2 ms
TCP Connect 2 ms
TLS Handshake 5.4 ms
Time To First Byte (TTFB) 122 ms
Content Download 0.1 ms
Total Response Time 122 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 | Polymer Legal Files |
Title Polymer Legal Files
HTTP Headers
| Server
| GitHub.com |
| Content-type
| text/html; charset=utf-8 |
| Last-modified
| Wed, 10 Aug 2016 19:00:16 GMT |
| Access-control-allow-origin
| * |
| Etag
| W/"57ab79c0-3ed" |
| Expires
| Tue, 25 Aug 2026 11:41:47 GMT |
| Cache-control
| max-age=600 |
| Content-encoding
| gzip |
| X-proxy-cache
| MISS |
| X-github-request-id
| 9C02:34686A:1C6262:1C7A3D:6A8D7D22 |
| X-github-edge-region
| fra |
| Accept-ranges
| bytes |
| Age
| 0 |
| Date
| Tue, 25 Aug 2026 11:52:27 GMT |
| Via
| 1.1 varnish |
| X-served-by
| cache-par-lfpg1960095-PAR |
| X-cache
| HIT |
| X-cache-hits
| 0 |
| X-timer
| S1787658747.112318,VS0,VE113 |
| Vary
| Accept-Encoding |
| X-fastly-request-id
| 1c21ab919cf12add8f320ddc814250e7ec1da981 |
| Content-length
| 505 |
Server GitHub.com
Content-type text/html; charset=utf-8
Last-modified Wed, 10 Aug 2016 19:00:16 GMT
Access-control-allow-origin *
Etag W/"57ab79c0-3ed"
Expires Tue, 25 Aug 2026 11:41:47 GMT
Cache-control max-age=600
Content-encoding gzip
X-proxy-cache MISS
X-github-request-id 9C02:34686A:1C6262:1C7A3D:6A8D7D22
X-github-edge-region fra
Accept-ranges bytes
Age 0
Date Tue, 25 Aug 2026 11:52:27 GMT
Via 1.1 varnish
X-served-by cache-par-lfpg1960095-PAR
X-cache HIT
X-cache-hits 0
X-timer S1787658747.112318,VS0,VE113
Vary Accept-Encoding
X-fastly-request-id 1c21ab919cf12add8f320ddc814250e7ec1da981
Content-length 505
