HTTPS & Sicherheitssignale
The padlock is table stakes for rankings, browsers and user trust. Betrifft: SEO
Security as a visibility signal
HTTPS has been a ranking signal for years, and browsers now actively warn on plain HTTP pages and mixed content. One insecure script on a secure page can break the padlock and, with it, visitor trust. HSTS tells browsers to never even try HTTP again.
Security failures also get sites de-listed abruptly: a hacked page injected with spam can trigger warnings in results within days.
What this site measures
Whether the site serves over HTTPS, whether HTTP redirects to HTTPS, the HSTS header, mixed-content references, declared charset, and modern protocol support (HTTP/2 or newer).
How to improve
- Certificates are free (Let's Encrypt) and automatic on most modern hosting.
- 301-redirect all HTTP URLs to their HTTPS twins, sitewide.
- Fix mixed content: every script, style, image and frame loads over https.
- Add HSTS once you're confident HTTPS is stable everywhere.
- Keep platforms and plugins updated; most hacks exploit known old bugs.
Common mistakes
A valid certificate but no redirect, so both versions live in parallel. Hardcoded http:// image URLs from an old migration. Letting the certificate lapse on the weekend nobody's watching.
Hier sehen Sie, wo Ihre Website steht: bewerten Sie es – und jede Prüfung zeigt ihre Nachweise.
Meine Website bewerten →Weitere Leitfäden
Eine Website aufbauen, die gefunden wird
Starting from zero? The platform choices, pages and foundations that decide whether your site is visible from day one.
Vollständigen Leitfaden lesen →Ihre Website verbessern — in der richtigen Reihenfolge
The improvement playbook: what to fix first, what compounds, and how to verify each step actually landed.
Vollständigen Leitfaden lesen →GEO, AEO & LLMO: das neue Alphabet, erklärt
The three terms you'll hear most for AI-era optimization: what each means, how they differ, and what to actually do about them.
Vollständigen Leitfaden lesen →So funktioniert das Suchranking
Crawling, indexing, ranking, and which of the three you actually control.
Vollständigen Leitfaden lesen →KI & Answer-Engines (AIO)
A growing share of questions never reach a results page; an assistant answers them.
Vollständigen Leitfaden lesen →Titles & Meta-Descriptions
Your headline and your sales pitch in every results page and AI citation.
Vollständigen Leitfaden lesen →