Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 150.171.110.117 |
| Compression | gzip |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 150.171.110.117
Compression gzip
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://bl.uk:443 | 308 | HTTP/2 308 |
| 2 | https://www.bl.uk/ | 200 | HTTP/2 200 |
#1 URL https://bl.uk:443
HTTP Status Code 308
Status HTTP/2 308
#2 URL https://www.bl.uk/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 4.1 ms |
| TCP Connect | 5.4 ms |
| TLS Handshake | 8.8 ms |
| Time To First Byte (TTFB) | 222.9 ms |
| Content Download | 53.8 ms |
| Total Response Time | 276.7 ms |
DNS Lookup 4.1 ms
TCP Connect 5.4 ms
TLS Handshake 8.8 ms
Time To First Byte (TTFB) 222.9 ms
Content Download 53.8 ms
Total Response Time 276.7 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=63072000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ✔ ALLOW-FROM https://sanitycms.bl.uk |
| X-Content-Type-Options | ✔ nosniff |
| Referrer Policy | strict-origin-when-cross-origin |
| Permissions Policy | ✔ Configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=63072000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ✔ ALLOW-FROM https://sanitycms.bl.uk
X-Content-Type-Options ✔ nosniff
Referrer Policy strict-origin-when-cross-origin
Permissions Policy ✔ Configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | The British Library - the national Library of the UK |
| Meta Description | Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us. |
| Canonical | https://www.bl.uk |
| Robots Meta | index |
| Open Graph Title | Welcome to the British Library |
| Open Graph Description | We are the UK's national library. Open to everyone and free to use. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. |
| Open Graph Image | https://www.bl.uk/images/v5dwkion/production/5c74153cc4a1... |
| Twitter Card | summary_large_image |
| Twitter Title | Welcome to the British Library |
| Twitter Description | We are the UK's national library. Open to everyone and free to use. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. |
| Twitter Image | https://www.bl.uk/images/v5dwkion/production/5c74153cc4a1... |
Title The British Library - the national Library of the UK Meta Description Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us. Canonical https://www.bl.uk Robots Meta index Open Graph Title Welcome to the British Library Open Graph Description We are the UK's national library. Open to everyone and free to use. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Open Graph Image https://www.bl.uk/images/v5dwkion/production/5c74153cc4a1... Twitter Card summary_large_image Twitter Title Welcome to the British Library Twitter Description We are the UK's national library. Open to everyone and free to use. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Twitter Image https://www.bl.uk/images/v5dwkion/production/5c74153cc4a1... Detected Technologies
| Technology | React Google Analytics Google Tag Manager Next.js |
Technology React Google Analytics Google Tag Manager Next.js
HTTP Headers
| Date
| Wed, 19 Aug 2026 23:47:50 GMT |
| Content-type
| text/html; charset=utf-8 |
| Cache-control
| private, no-cache, no-store, max-age=0, must-revalidate |
| Content-encoding
| gzip |
| Vary
| rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding |
| Strict-transport-security
| max-age=63072000; includeSubDomains; preload |
| Request-context
| appId=cid-v1: |
| Referrer-policy
| strict-origin-when-cross-origin |
| X-content-type-options
| nosniff |
| Content-security-policy
| frame-ancestors 'self' https://sanitycms.bl.uk |
| X-frame-options
| ALLOW-FROM https://sanitycms.bl.uk |
| Permissions-policy
| fullscreen=(self), autoplay=(self) |
| Link
| ; rel=preload; as="font"; crossorigin=""; type="font/woff2", ; rel=preload; as="style", ; rel=preload; as="style", ; rel=preload; as="style" |
| X-powered-by
| Next.js |
| X-azure-ref
| 20260819T234750Z-r1dcc4897d725nc8hC1PAR1k880000001hn0000000008yqe |
| X-cache
| CONFIG_NOCACHE |
Meta Tags
| Viewport | width=device-width, initial-scale=1 |
| Description | Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us. |
| Robots | index |
Date Wed, 19 Aug 2026 23:47:50 GMT
Content-type text/html; charset=utf-8
Cache-control private, no-cache, no-store, max-age=0, must-revalidate
Content-encoding gzip
Vary rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding
Strict-transport-security max-age=63072000; includeSubDomains; preload
Request-context appId=cid-v1:
Referrer-policy strict-origin-when-cross-origin
X-content-type-options nosniff
Content-security-policy frame-ancestors 'self' https://sanitycms.bl.uk
X-frame-options ALLOW-FROM https://sanitycms.bl.uk
Permissions-policy fullscreen=(self), autoplay=(self)
Link ; rel=preload; as="font"; crossorigin=""; type="font/woff2", ; rel=preload; as="style", ; rel=preload; as="style", ; rel=preload; as="style"
X-powered-by Next.js
X-azure-ref 20260819T234750Z-r1dcc4897d725nc8hC1PAR1k880000001hn0000000008yqe
X-cache CONFIG_NOCACHE
