seznamka.cz

We performed a comprehensive analysis of seznamka.cz on 2026-06-30. The website returned an HTTP 200 status code with a server response time of 7724ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 95 KB. The website uses a secure HTTPS connection with a valid SSL certificate issued by Let's Encrypt (DV type). The connection is encrypted using TLS 1.3 with the TLS_AES_256_GCM_SHA384 cipher suite and sha256WithRSAEncryption signature algorithm. The certificate covers 2 domain(s) (Subject Alternative Names) and expires on 2026-09-03, which is 65 days from now. The security headers analysis reveals a score of 0/100 (poor). No security headers are configured, which is a significant security concern. However, the site is missing Content-Security-Policy, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 8 technologies across 7 categories powering seznamka.cz. The detected stack includes Bootstrap, Google Analytics 4, Google Tag Manager, Meta Pixel, Google Ads, StackPath, jQuery, and Font Awesome. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, seznamka.cz receives an overall trust score of 65/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, seznamka.cz receives a trust score of 65/100, which places it in the "Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, a valid SSL certificate issued by Let's Encrypt with 65 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, DNSSEC providing authenticated DNS responses, and a well-established domain registered for over 28.7 years, indicating long-term commitment and legitimacy. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking), missing Referrer-Policy, potentially leaking URL information to third parties, and the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked seznamka.cz against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned seznamka.cz and identified 8 distinct technologies across 7 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. CSS Framework: Bootstrap — provides the styling and responsive layout system for seznamka.cz. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for seznamka.cz. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for seznamka.cz. Advertising: Meta Pixel and Google Ads — handles advertising pixel tracking and conversion measurement for seznamka.cz. CDN: StackPath — accelerates content delivery by caching assets at edge locations worldwide for seznamka.cz. JavaScript Library: jQuery — provides utility functions and DOM manipulation for seznamka.cz. Icon Set: Font Awesome — provides additional functionality for seznamka.cz. We also extracted the following tracking identifiers: Google Tag Manager container GTM-5GG8NGN. These IDs can be used to identify other websites operated by the same organization.

seznamka.cz delivers its homepage in 7724ms (server response time), which is considered slow by industry standards. The total page weight is 95 KB, and we detected 274 resource requests loading assets from 19 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 2 out of 3 CSS files and 6 out of 10 JavaScript files are minified. Minifying the remaining 5 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. From an environmental perspective, each page view of seznamka.cz produces approximately 0.05g of CO₂, earning a carbon rating of A. This places the website among the cleanest on the web, demonstrating efficient use of server resources and optimized content delivery. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 95 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for seznamka.cz. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

seznamka.cz resolves to the IPv4 address 212.109.183.150, but does not support IPv6. IPv6 adoption is increasingly important as IPv4 address space becomes exhausted, and some ISPs and regions are transitioning to IPv6-only connectivity. The domain has 1 A record(s) configured. The domain name system is managed by 3 name servers: ns.forpsi.cz, ns.forpsi.it, and ns.forpsi.net. Having 3 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for seznamka.cz is handled by tanger.cz with 2 MX records configured: mail26.tanger.cz and mail28.tanger.cz. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC is not configured, leaving the domain vulnerable to email spoofing and phishing attacks that impersonate this domain. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is enabled for seznamka.cz, providing an additional layer of security by cryptographically signing DNS records. This prevents DNS cache poisoning and man-in-the-middle attacks that could redirect visitors to malicious websites. Our subdomain enumeration scan discovered 10 active subdomains for seznamka.cz: admin.seznamka.cz, api.seznamka.cz, app.seznamka.cz, blog.seznamka.cz, cdn.seznamka.cz, dev.seznamka.cz, m.seznamka.cz, and mail.seznamka.cz. Plus 2 additional subdomains. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of seznamka.cz contains 1,528 words of visible text content. This is a substantial amount of content that provides good opportunities for search engine indexing. The page is structured with 24 H2 headings, 13 H3 headings, 0 H4 headings. The page includes 54 images. 4 images (7%) are missing alt text attributes, which is a significant concern for both accessibility and SEO. Screen readers rely on alt text to describe images to visually impaired users, and search engines use alt text to understand image content. Only 93% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 169 internal links pointing to other pages on the same domain and 12 external links pointing to third-party websites. The high number of internal links suggests a well-interconnected site structure, which helps search engines discover and crawl all pages efficiently. There are 10 external JavaScript files, 3 CSS stylesheets, and 1 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages), robots.txt (controls search engine crawling behavior), Schema.org structured data (Organization and WebSite), and Progressive Web App (PWA) manifest (enabling app-like installation).

The title tag for seznamka.cz is well-optimized at 50 characters: "Seznamka.cz - Tradiční seznamka zdarma, již 25 let". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 137 characters (well-optimized): "Seznamka.cz je tradiční a největší internetová česká seznamka zdarma. Více než 280 000 registrovaných uživatelů. Zkus se...". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The canonical url is correctly set to https://www.seznamka.cz, preventing duplicate content issues, the page language is declared as cs, and a favicon is configured. Open Graph meta tags are configured with 3/4 recommended fields: OG title ("Seznamka.cz -Tradiční seznamka v ČR, úspěšně fungujeme již 2..."), OG description, OG type (website). These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol. The site implements Schema.org structured data with the following types: Organization and WebSite. Structured data helps search engines understand the page content and can enable rich results (featured snippets, knowledge panels, star ratings) in Google search results, which can significantly increase click-through rates. The meta keywords tag contains 5 terms including seznamka, seznámit, seznámení, na mobilu, and inzerát. Note: Google has officially confirmed that it does not use the meta keywords tag as a ranking signal. However, some other search engines (Bing, Yandex) may still reference it.