5fin.cz

We performed a comprehensive analysis of 5fin.cz on 2026-06-28. The website returned an HTTP 200 status code with a server response time of 22762ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 45 KB. Warning: The website does not have a valid SSL certificate. Visitors may see security warnings in their browser, and data transmitted to and from this website is not encrypted. 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 5 technologies across 4 categories powering 5fin.cz. The detected stack includes Google Analytics 4, Cloudflare, Amazon CloudFront, Google Fonts, and jQuery. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, 5fin.cz receives an overall trust score of 58/100, classified as "Caution Advised".

After conducting a thorough safety and legitimacy analysis, 5fin.cz receives a trust score of 58/100, which places it in the "Caution Advised" 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, DMARC email authentication with a none policy, DNSSEC providing authenticated DNS responses, and a domain registered for 4.2 years. 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 5fin.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 5fin.cz and identified 5 distinct technologies across 4 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for 5fin.cz. CDN: Cloudflare and Amazon CloudFront — accelerates content delivery by caching assets at edge locations worldwide for 5fin.cz. Fonts: Google Fonts — delivers web fonts for typography for 5fin.cz. JavaScript Library: jQuery — provides utility functions and DOM manipulation for 5fin.cz. We also extracted the following tracking identifiers: Google Analytics 4 Measurement ID G-2W7MG0JLW6. These IDs can be used to identify other websites operated by the same organization.

5fin.cz delivers its homepage in 22762ms (server response time), which is considered slow by industry standards. The total page weight is 45 KB, and we detected 154 resource requests loading assets from 5 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: 1 out of 2 CSS files and 2 out of 4 JavaScript files are minified. Minifying the remaining 3 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 5fin.cz produces approximately 0.02g 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 45 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for 5fin.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.

5fin.cz resolves to the IPv4 address 78.24.11.202 and also supports IPv6 (2a00:1ed0:149:1:4e18:bca:2:1), demonstrating modern network infrastructure readiness. The domain has 1 A record(s) configured. The domain name system is managed by 5 name servers: ns.gransy.com, ns2.gransy.com, ns3.gransy.com, ns4.gransy.com, and ns5.gransy.com. Having 5 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 5fin.cz is handled by seznam.cz with 2 MX records configured: b2eb756f5c572837.mx2.emailprofi.seznam.cz and b2eb756f5c572837.mx1.emailprofi.seznam.cz. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF is not configured, meaning any server could potentially send emails pretending to be from this domain. This is a significant email security concern. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a none policy — a monitoring-only setting that doesn't enforce any action on unauthorized emails. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is enabled for 5fin.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 25 active subdomains for 5fin.cz: admin.5fin.cz, api.5fin.cz, app.5fin.cz, apps.5fin.cz, blog.5fin.cz, cdn.5fin.cz, community.5fin.cz, and dev.5fin.cz. Plus 17 additional subdomains. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of 5fin.cz contains 747 words of visible text content. This is a moderate amount of content. The page is structured with 21 H2 headings, 10 H3 headings, 0 H4 headings. The page includes 31 images. All images have proper alt text attributes ✓, which is excellent for both accessibility (screen readers) and SEO (search engines can understand image content). The link structure consists of 109 internal links pointing to other pages on the same domain and 0 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 4 external JavaScript files, 2 CSS stylesheets, and 0 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages) and RSS feed for content syndication. Notable missing features: robots.txt and Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility.

The title tag for 5fin.cz is well-optimized at 58 characters: "Recenze, testy, zkušenosti a hodnocení finančních produktů". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 139 characters (well-optimized): "Hledáte rady a tipy na osobní nebo firemní finance? Pak právě portál 5fin je tu pro vás! Srovnáváme a hodnotíme stovky f...". 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.5fin.cz/, preventing duplicate content issues, the page language is declared as cs, and a favicon is configured. Open Graph meta tags are configured with 2/4 recommended fields: OG title ("Recenze, testy, zkušenosti a hodnocení finančních produktů..."), 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.