Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 100.28.67.211 |
| Server Software | Apache |
| CDN | CDN (Miss from cloudfront) |
| Compression | gzip |
|
🔒 🟡 Mixed Content (1 HTTP resources) | The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers. |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 100.28.67.211
Server Software Apache
CDN CDN (Miss from cloudfront)
Compression gzip
🔒 🟡 Mixed Content (1 HTTP resources) The page is served over HTTPS but loads 1 resource(s) over HTTP. This may be blocked in modern browsers.
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://zotero.org:443 | 301 | HTTP/2 301 |
| 2 | https://www.zotero.org/ | 200 | HTTP/2 200 |
#1 URL https://zotero.org:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.zotero.org/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 8.4 ms |
| TCP Connect | 9.5 ms |
| TLS Handshake | 4.1 ms |
| Time To First Byte (TTFB) | 114.4 ms |
| Content Download | 0.3 ms |
| Total Response Time | 114.6 ms |
DNS Lookup 8.4 ms
TCP Connect 9.5 ms
TLS Handshake 4.1 ms
Time To First Byte (TTFB) 114.4 ms
Content Download 0.3 ms
Total Response Time 114.6 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; includeSubDomains; preload |
| CSP | ✔ Configured |
| X-Frame-Options | ✔ SAMEORIGIN |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000; includeSubDomains; preload
CSP ✔ Configured
X-Frame-Options ✔ SAMEORIGIN
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Zotero | Your personal research assistant |
| Meta Description | Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research. |
Title Zotero | Your personal research assistant
Meta Description Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Detected Technologies
| Technology | Google Analytics Apache |
Technology Google Analytics Apache
HTTP Headers
| Content-type
| text/html; charset=UTF-8 |
| Content-length
| 11728 |
| Date
| Fri, 24 Jul 2026 19:12:22 GMT |
| Content-encoding
| gzip |
| Server
| Apache |
| X-frame-options
| SAMEORIGIN |
| Content-security-policy
| default-src 'self' https://api.zotero.org; script-src 'self' https://api.zotero.org 'nonce-00586iqfea'; style-src 'self' 'nonce-abw6ihlt12'; img-src 'self' https://s3.amazonaws.com/; frame-src 'self'; connect-src 'self' https://api.zotero.org https://api.zotero.org https://www.zotero.org https://zoterofilestorage.s3.amazonaws.com https://zoterofilestorage.s3.us-east-1.amazonaws.com/ https://t0guvf0w17.execute-api.us-east-1.amazonaws.com https://services.zotero.org wss://stream.zotero.org https://files.zotero.net; child-src 'self'; worker-src 'self' |
| Strict-transport-security
| max-age=31536000; includeSubDomains; preload |
| Vary
| Accept-Encoding |
| X-cache
| Miss from cloudfront |
| Via
| 1.1 fab6b8748e77d595c3927b3323efa8de.cloudfront.net (CloudFront) |
| X-amz-cf-pop
| CDG50-P5 |
| Alt-svc
| h3=":443"; ma=86400 |
| X-amz-cf-id
| 68SmQr2iWiSlonqSsFIdB4TiKA5e9o-V3zJUTdF9ov_EbrE_yCHJTg== |
Meta Tags
| Viewport | width=device-width, initial-scale=1, shrink-to-fit=no |
| Description | Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research. |
Content-type text/html; charset=UTF-8
Content-length 11728
Date Fri, 24 Jul 2026 19:12:22 GMT
Content-encoding gzip
Server Apache
X-frame-options SAMEORIGIN
Content-security-policy default-src 'self' https://api.zotero.org; script-src 'self' https://api.zotero.org 'nonce-00586iqfea'; style-src 'self' 'nonce-abw6ihlt12'; img-src 'self' https://s3.amazonaws.com/; frame-src 'self'; connect-src 'self' https://api.zotero.org https://api.zotero.org https://www.zotero.org https://zoterofilestorage.s3.amazonaws.com https://zoterofilestorage.s3.us-east-1.amazonaws.com/ https://t0guvf0w17.execute-api.us-east-1.amazonaws.com https://services.zotero.org wss://stream.zotero.org https://files.zotero.net; child-src 'self'; worker-src 'self'
Strict-transport-security max-age=31536000; includeSubDomains; preload
Vary Accept-Encoding
X-cache Miss from cloudfront
Via 1.1 fab6b8748e77d595c3927b3323efa8de.cloudfront.net (CloudFront)
X-amz-cf-pop CDG50-P5
Alt-svc h3=":443"; ma=86400
X-amz-cf-id 68SmQr2iWiSlonqSsFIdB4TiKA5e9o-V3zJUTdF9ov_EbrE_yCHJTg==
