estranky.cz

We performed a comprehensive analysis of estranky.cz on 2026-06-29. The website returned an HTTP 200 status code with a server response time of 19195ms. The page is served over HTTP/1.1 protocol, however no compression (Gzip or Brotli) is enabled, which means the page is transferred at its full uncompressed size. The total page weight is 33 KB. The website uses a secure HTTPS connection with a valid SSL certificate issued by DigiCert Inc (OV type). The connection is encrypted using TLS 1.2 with the ECDHE-RSA-AES128-GCM-SHA256 cipher suite and sha256WithRSAEncryption signature algorithm. The certificate covers 2 domain(s) (Subject Alternative Names) and expires on 2027-02-10, which is 226 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 10 technologies across 8 categories powering estranky.cz. The detected stack includes Bootstrap 4.3.1, Google Analytics 4, Google Tag Manager, reCAPTCHA v3, Cloudflare, Amazon CloudFront, StackPath, Google Fonts, jQuery 3.3.1., and Font Awesome. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, estranky.cz receives an overall trust score of 68/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, estranky.cz receives a trust score of 68/100, 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 DigiCert Inc with 226 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, DMARC email authentication with a none policy, DKIM (DomainKeys Identified Mail) providing cryptographic email verification, and a well-established domain registered for over 22.6 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, the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity, and DNSSEC is not enabled, leaving DNS queries vulnerable to spoofing attacks. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked estranky.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 estranky.cz and identified 10 distinct technologies across 8 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 (version 4.3.1) — provides the styling and responsive layout system for estranky.cz. Analytics: Google Analytics 4 — tracks visitor behavior and provides traffic insights for estranky.cz. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for estranky.cz. Security: reCAPTCHA v3 — provides security features like bot detection and CAPTCHA for estranky.cz. CDN: Cloudflare, Amazon CloudFront, and StackPath — accelerates content delivery by caching assets at edge locations worldwide for estranky.cz. Fonts: Google Fonts — delivers web fonts for typography for estranky.cz. JavaScript Library: jQuery (version 3.3.1.) — provides utility functions and DOM manipulation for estranky.cz. Icon Set: Font Awesome — provides additional functionality for estranky.cz. We also extracted the following tracking identifiers: Google Tag Manager container GTM-KHXLQN. These IDs can be used to identify other websites operated by the same organization.

estranky.cz delivers its homepage in 19195ms (server response time), which is considered slow by industry standards. The total page weight is 33 KB, and we detected 56 resource requests loading assets from 11 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. No compression is currently enabled on estranky.cz. Enabling Brotli or Gzip compression could reduce page size by 60-80% for text-based assets (HTML, CSS, JavaScript), significantly improving load times and reducing bandwidth costs. This is one of the simplest and most impactful performance optimizations available. Asset minification status: 2 out of 5 CSS files and 3 out of 6 JavaScript files are minified. Minifying the remaining 6 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 estranky.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 33 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for estranky.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.

estranky.cz resolves to the IPv4 address 81.0.235.78, 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: dns.nethost.cz, sns.nethost.sk, and tns.nethost.cz. 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 estranky.cz is handled by estranky.cz with 2 MX records configured: mail.estranky.cz and sns.nethost.sk. 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 (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 (DomainKeys Identified Mail) is configured, adding a cryptographic signature to outgoing emails that receiving servers can verify to confirm the email hasn't been tampered with in transit. DNSSEC is not enabled for estranky.cz. While not critical for most websites, DNSSEC adds an important security layer by ensuring DNS responses haven't been tampered with during transit. Enabling DNSSEC is recommended for domains handling sensitive data or financial transactions. Our subdomain enumeration scan discovered 25 active subdomains for estranky.cz: admin.estranky.cz, api.estranky.cz, app.estranky.cz, apps.estranky.cz, blog.estranky.cz, cdn.estranky.cz, community.estranky.cz, and dev.estranky.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 estranky.cz contains 496 words of visible text content. This is a moderate amount of content. The page is structured with 1 H2 headings, 2 H3 headings, 5 H4 headings, 1 H5, and 0 H6 headings. The page includes 16 images. 16 images (100%) 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 0% of images have proper alt text — we recommend adding descriptive alt attributes to all images. The link structure consists of 18 internal links pointing to other pages on the same domain and 6 external links pointing to third-party websites. There are 6 external JavaScript files, 5 CSS stylesheets, and 2 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages). Notable missing features: robots.txt and Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility. The website has social media presence across 1 platforms: Facebook (@estranky). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for estranky.cz is well-optimized at 53 characters: "Tvorba webových stránek zdarma a rychle - eStránky.cz". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 173 characters (slightly long): "Tvorba webových stránek zdarma☝️ Vyzkoušejte eStránky.cz a založte si svůj web či blog snadno a rychle bez znalosti prog...". 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 page language is declared as cs, the meta robots directive is set to all,follow, and a favicon is configured. No Open Graph tags are configured. When someone shares a link to estranky.cz on social media, the platform will have to guess the title, description, and image — often producing unattractive or inaccurate previews. Adding OG tags is essential for social media marketing. The meta keywords tag contains 7 terms including webové stránky zdarma, tvorba webu, tvorba webových stránek, tvorba www stránek, and vytvoření webových stránek. 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.