What technology does openthesaurus.de use?

openthesaurus.de is built with Plausible Analytics, Nginx.

Is openthesaurus.de secure (HTTPS)?

Yes. openthesaurus.de uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 3, 2026.

Who hosts openthesaurus.de?

Hosting provider information for openthesaurus.de is not available yet.

What is openthesaurus.de's SEO score?

openthesaurus.de scored 60/100 for SEO in the latest analysis (fair).

What is openthesaurus.de's overall website score?

openthesaurus.de has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.

Has openthesaurus.de's score changed over time?

openthesaurus.de's overall score has stayed steady at 77/100 since Jul 27, 2026.

openthesaurus.de

Synonyme - OpenThesaurus - Deutscher Thesaurus

Last scanned Aug 4, 2026, 3:00 PM · 9 views

Overall score

Fair

Summary

Freies deutsches Wörterbuch für Synonyme, Gegenwörter und Assoziationen. This website uses Plausible Analytics. SEO is fair (60/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.

Freies deutsches Wörterbuch für Synonyme, Gegenwörter und Assoziationen. Mehr als 100.000 Wörter.

Top issues to fix

12 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.
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.
1 cookie without Secure/HttpOnly flags
Security
Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+6 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

244 ms

Security

HTTPS & header checks

Accessibility

1 issue(s) found

Score history

0 overall since Jul 27, 2026

Overall: 77
SEO: 60
Security: 65
Performance: 100
Accessibility: 90

Organization

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

Freies deutsches Wörterbuch für Synonyme, Gegenwörter und Assoziationen. Mehr als 100.000 Wörter.

Meta tags

Title: Synonyme - OpenThesaurus - Deutscher Thesaurus
Description: Freies deutsches Wörterbuch für Synonyme, Gegenwörter und Assoziationen. Mehr als 100.000 Wörter.
Canonical
Language: de
Charset
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Plausible Analytics Nginx

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: Let's Encrypt
Subject: www.openthesaurus.de
Valid from: Jul 5, 2026
Valid to: Oct 3, 2026
Days until expiry: 59
SAN domains: www.openthesaurus.de

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

11 internal · 2 external · 1 broken

Images

5 total · 0 missing alt

Scripts / Styles

6 scripts · 1 stylesheets

JS / CSS size

10.4 KB · 0 B

Page size

16.0 KB

Robots.txt & Sitemap

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

SEO issues

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

Scan details

Requested URL: https://openthesaurus.de
Final URL: https://www.openthesaurus.de/
HTTP status: 200
HTTP version: HTTP/2
Response time: 244 ms
HTML size: 16.0 KB
Redirect chain: https://openthesaurus.de → https://www.openthesaurus.de/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does openthesaurus.de use?: openthesaurus.de is built with Plausible Analytics, Nginx.
Is openthesaurus.de secure (HTTPS)?: Yes. openthesaurus.de uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 3, 2026.
Who hosts openthesaurus.de?: Hosting provider information for openthesaurus.de is not available yet.
What is openthesaurus.de's SEO score?: openthesaurus.de scored 60/100 for SEO in the latest analysis (fair).
What is openthesaurus.de's overall website score?: openthesaurus.de has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
Has openthesaurus.de's score changed over time?: openthesaurus.de's overall score has stayed steady at 77/100 since Jul 27, 2026.