Is slf.ch secure (HTTPS)?

Yes. slf.ch uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Nov 27, 2026.

Hosting provider information for slf.ch is not available yet.

What is slf.ch's SEO score?

slf.ch scored 65/100 for SEO in the latest analysis (fair).

What is slf.ch's overall website score?

slf.ch has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.

slf.ch

WSL-Institut für Schnee- und Lawinenforschung SLF

Last scanned Aug 24, 2026, 1:22 PM · 1 view

Overall score

Great

Summary

Das WSL-Institut für Schnee- und Lawinenforschung SLF ist Teil der Eidg. This website uses Apache. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Das WSL-Institut für Schnee- und Lawinenforschung SLF ist Teil der Eidg. Forschungsanstalt WSL und gehört damit zum ETH-Bereich. Seine Aufgaben sind Forschung und wissenschaftliche Dienstleistungen rund um Schnee, Lawinen, weitere alpine Naturgefahren, Permafrost und Gebirgsökosysteme. Seine bekannteste Dienstleistung ist das Lawinenbulletin.

Top issues to fix

6 issues found · 1 high priority

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.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

5 issue(s) found

100

Performance

508 ms

100

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.

YouTube LinkedIn Instagram Facebook

Meta tags

Title: WSL-Institut für Schnee- und Lawinenforschung SLF
Description: Das WSL-Institut für Schnee- und Lawinenforschung SLF ist Teil der Eidg. Forschungsanstalt WSL und gehört damit zum ETH-Bereich. Seine Aufgaben sind Forschung und wissenschaftliche Dienstleistungen rund um Schnee, Lawinen, weitere alpine Naturgefahren, Permafrost und Gebirgsökosysteme. Seine bekannteste Dienstleistung ist das Lawinenbulletin.
Canonical: https://www.slf.ch/de/
Language: de-CH
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0
Robots meta: index,follow
Manifest

Technologies

Detected frameworks, languages, and tools.

Apache

Hosting & CDN

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

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: DigiCert Inc
Subject: *.slf.ch
Valid from: May 13, 2026
Valid to: Nov 27, 2026
Days until expiry: 94
SAN domains: *.slf.ch, slf.ch

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 6 · H3 0

Links

31 internal · 16 external · 20 broken

Images

14 total · 0 missing alt

Scripts / Styles

2 scripts · 4 stylesheets

JS / CSS size

416 B · 0 B

Page size

52.4 KB

Robots.txt & Sitemap

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

SEO issues

Meta description longer than 160 characters
No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://slf.ch
Final URL: https://www.slf.ch/de/
HTTP status: 200
HTTP version: HTTP/2
Response time: 507 ms
HTML size: 52.4 KB
Redirect chain: https://slf.ch → https://www.slf.ch/ → https://www.slf.ch/de/

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Frequently asked questions

What technology does slf.ch use?: slf.ch is built with Apache.
Is slf.ch secure (HTTPS)?: Yes. slf.ch uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Nov 27, 2026.
Who hosts slf.ch?: Hosting provider information for slf.ch is not available yet.
What is slf.ch's SEO score?: slf.ch scored 65/100 for SEO in the latest analysis (fair).
What is slf.ch's overall website score?: slf.ch has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.