Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

+6 more issues — details in the sections below.

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Technology stack

okan.edu.tr is built with jQuery, Nginx and Google Analytics.

Hosting & DNS

Domain

okan.edu.tr

IP address: —
ASN: —
IPv6: Not supported
HTTP: HTTP/1.1

AAAA

TXT

CAA

Show DNS record values

TXT record contents are not republished; only their count is shown.

Security

okan.edu.tr uses TLS 1.2 with a certificate valid for 117 more days and sets 0 of 6 recommended security headers.

Security

Security headers0 of 6 set

HSTS
Forces HTTPS
CSP
Blocks injected scripts
X-Frame-Options
Stops clickjacking
X-Content-Type
Stops MIME sniffing
Referrer-Policy
Limits URL leakage
Permissions-Policy
Restricts browser features

TLS certificate

VerifiedTLS 1.2 · GlobalSign nv-sa

Jun 4, 2026117 days leftDec 20, 2026

Names covered: 2
Cookies set: 0

Email security

okan.edu.tr scores F for email security, with no SPF record and DMARC policy “none”.

15 / 100

SPFNot set
No SPF record: anyone can claim to send mail from this domain.
DMARCWeak
Monitoring only: forged mail is still delivered.
MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
BIMINot set
Not published (optional).

Performance & carbon

okan.edu.tr scores 90/100 for performance, with an estimated load time of 0.5 s. A visit emits an estimated 0.05 g of CO2 (grade A+).

Performance

Page weight

HTML 148 KB
JavaScript 1.3 KB

Est. load: 541 ms
Response: 538 ms
Scripts / CSS: 10 / 5

Carbon per visitA+

A+ABCDEF

0.05 g CO2 per uncached view

Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.

SEO & accessibility

okan.edu.tr scores 50/100 for SEO and 90/100 for accessibility, with 7 SEO issues to fix.

SEO

Accessibility

Heading structure

No H1 found.

Image alt text

97%

216 images · 6 without alt text · 0 lazy-loaded

SEO issues7

Missing meta description
Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Accessibility issues1

No H1 heading found

Technical details

Page metadata, social tags, crawl files and scan information.

Meta tags

Title: İstanbul Okan Üniversitesi - İstanbul Okan Üniversitesi
Description
Canonical
Language: tr
Robots meta: index, follow

Crawl files

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

Structured data

No JSON-LD types declared.

Microdata items: 0
RDFa items: 0

Scan

Final URL: https://www.okan.edu.tr/
HTTP status: 200
Redirects: https://okan.edu.tr → https://www.okan.edu.tr/
Scanned: Aug 24, 2026, 1:22 PM

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Frequently asked questions about okan.edu.tr

What is okan.edu.tr?: okan.edu.tr is a website.
What technology does okan.edu.tr use?: okan.edu.tr is built with jQuery, Nginx and Google Analytics.
Is okan.edu.tr secure?: okan.edu.tr uses TLS 1.2 with a certificate valid for 117 more days and sets 0 of 6 recommended security headers.
Is okan.edu.tr protected against email spoofing?: okan.edu.tr scores F for email security, with no SPF record and DMARC policy “none”.
What is okan.edu.tr's overall score?: okan.edu.tr has an overall SiteGraph score of 72/100, combining SEO (50), performance (90), security (65) and accessibility (90).

Score profile

Top issues to fix

Analytics (1)

Libraries (1)

Servers (1)