switowski.com

Sebastian Witowski

Sebastian Witowski - Python freelancer, consultant, and trainer.

Built with

Frontend framework

Eleventy

Generator tag

Eleventy v1.0.2

Also detected

Libraries

Alpine.js

Infrastructure

Cloudflare · Netlify

Third-party services

Mailchimp

Overview

Status

alive

Registered

2018-08-02 (8 years ago)

First seen here

2026-09-22

Security grade

B (80/100, from headers & TLS)

Privacy score

86/100 (1 third-party script hosts, 1 tracking/marketing services)

Hosting

Cloudflare, Inc. · AS13335 · Canada

Server header

cloudflare

Response time

298 ms to first byte, measured from our crawler

TLS certificate

Google Trust Services · TLSv1.3 · expires 2026-11-09

Language

en

Mobile-ready

yes (viewport meta tag)

Linked to from

8 other sites seen so far

Loads scripts from

Third-party domains this page pulls JavaScript or iframes from. Each one can see who visits.

What to fix

1. Add a Content-Security-Policy
   Limits which scripts can run, and is the main defense against XSS. Start with Content-Security-Policy-Report-Only to test.
2. Add a Referrer-Policy
   Header: Referrer-Policy: strict-origin-when-cross-origin
3. Publish a DMARC record
   A TXT record at _dmarc.<domain>; start with v=DMARC1; p=none; to monitor.

Security & email signals

• ✓ HTTPS
• ✓ HSTS
• ✗ Content-Security-Policy
• ✓ X-Content-Type-Options
• ✓ X-Frame-Options
• ✗ Referrer-Policy
• ✓ Permissions-Policy
• ✓ SPF record
• ✗ DMARC record
• ✗ DKIM record
• ✓ Cookies set securely
• ✓ Has real content (not an empty shell)
• ✓ Valid TLS certificate

Badge

Show this site's security grade in a README or footer:

<a href="https://webtelemetry.dev/site/switowski.com"><img src="https://webtelemetry.dev/badge/switowski.com.svg" alt="Security grade"></a>

Generated automatically from passive, publicly observable data. Think something here is wrong or want this profile removed? See /bot. Machine-readable: JSON.