What technology does ciechanow.ski use?

ciechanow.ski is built with Google Analytics, Nginx.

Is ciechanow.ski secure (HTTPS)?

Yes. ciechanow.ski uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 5, 2026.

Who hosts ciechanow.ski?

Hosting provider information for ciechanow.ski is not available yet.

What is ciechanow.ski's SEO score?

ciechanow.ski scored 70/100 for SEO in the latest analysis (fair).

What is ciechanow.ski's overall website score?

ciechanow.ski has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.

ciechanow.ski

Bartosz Ciechanowski

Last scanned Aug 24, 2026, 1:22 PM

Overall score

Fair

Summary

Interactive articles about science and engineering. This website uses Nginx. SEO is fair (70/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.

Interactive articles about science and engineering.

Top issues to fix

11 issues found · 3 high priority

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.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
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.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+5 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

485 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

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

Organization

Company details published in this site's own structured data.

Interactive articles about science and engineering.

X (Twitter)Instagram YouTube

Contact

Email, phone, and address published on this site's own pages.

Email: bartosz@ciechanow.ski

Meta tags

Title: Bartosz Ciechanowski
Description: Interactive articles about science and engineering.
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0, viewport-fit=cover
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Google Analytics Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: 143.198.60.216
ASN: —

DNS records

Type	Value
A	143.198.60.216
AAAA	2604:a880:4:1d0::574:5000
MX	in1-smtp.messagingengine.com in2-smtp.messagingengine.com
TXT	v=spf1 include:spf.messagingengine.com ?all
NS	ns2.digitalocean.com ns3.digitalocean.com ns1.digitalocean.com
CAA	—
CNAME	—
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: ciechanow.ski
Valid from: Aug 7, 2026
Valid to: Nov 5, 2026
Days until expiry: 72
SAN domains: ciechanow.ski, www.ciechanow.ski

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 11 · H2 0 · H3 0

Links

21 internal · 80 external · 1 broken

Images

13 total · 10 missing alt

Scripts / Styles

6 scripts · 3 stylesheets

JS / CSS size

572 KB · 29.0 KB

Page size

160 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Found
URLs in sitemap: 28

SEO issues

Missing canonical link
Multiple H1 headings found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found

Scan details

Requested URL: https://ciechanow.ski
Final URL: https://ciechanow.ski
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 482 ms
HTML size: 160 KB
Redirect chain: https://ciechanow.ski

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does ciechanow.ski use?: ciechanow.ski is built with Google Analytics, Nginx.
Is ciechanow.ski secure (HTTPS)?: Yes. ciechanow.ski uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 5, 2026.
Who hosts ciechanow.ski?: Hosting provider information for ciechanow.ski is not available yet.
What is ciechanow.ski's SEO score?: ciechanow.ski scored 70/100 for SEO in the latest analysis (fair).
What is ciechanow.ski's overall website score?: ciechanow.ski has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.