What technology does onb.ac.at use?

onb.ac.at is built with Apache.

Is onb.ac.at secure (HTTPS)?

Yes. onb.ac.at uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Mar 9, 2027.

Hosting provider information for onb.ac.at is not available yet.

What is onb.ac.at's SEO score?

onb.ac.at scored 75/100 for SEO in the latest analysis (fair).

What is onb.ac.at's overall website score?

onb.ac.at has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.

onb.ac.at

Österreichische Nationalbibliothek - Startseite

Last scanned Jul 26, 2026, 5:17 AM · 1 view

Overall score

Fair

Summary

Herzlich willkommen in der Österreichischen Nationalbibliothek – der größten Bibliothek und zentralen Gedächtnisinstitution des Landes. This website uses Apache. SEO is good (75/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance fair (60/100). Top issue: Meta description longer than 160 characters.

Herzlich willkommen in der Österreichischen Nationalbibliothek – der größten Bibliothek und zentralen Gedächtnisinstitution des Landes. Nützen Sie den Bibliotheksservice eines modernen Informationszentrums. Entdecken Sie die Bestände und Schätze aus acht Sammlungen. Erleben Sie den Prunksaal und fünf Museen mit spannenden Dauer- und Sonderausstellungen.

Top issues to fix

8 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Slow estimated load (8.9s)
Performance
Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
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.

+2 more issues — details in the sections below.

SEO

4 issue(s) found

Performance

8.89 s

Security

HTTPS & header checks

100

Accessibility

0 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.

Facebook Instagram YouTube

Contact

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

Email: informationsservices@chat.eu.libraryh3lp.com office@fonda.at

Meta tags

Title: Österreichische Nationalbibliothek - Startseite
Description: Herzlich willkommen in der Österreichischen Nationalbibliothek – der größten Bibliothek und zentralen Gedächtnisinstitution des Landes. Nützen Sie den Bibliotheksservice eines modernen Informationszentrums. Entdecken Sie die Bestände und Schätze aus acht Sammlungen. Erleben Sie den Prunksaal und fünf Museen mit spannenden Dauer- und Sonderausstellungen.
Canonical: https://www.onb.ac.at/
Language: de-AT
Charset: utf-8
Viewport: width=device-width, initial-scale=1
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: Hellenic Academic and Research Institutions CA
Subject: onb.ac.at
Valid from: Mar 9, 2026
Valid to: Mar 9, 2027
Days until expiry: 225
SAN domains: onb.ac.at, onb.at, webmail.onb.ac.at, oenb.ac.at, netguides.onb.ac.at, www.oenb.ac.at, jobs.onb.ac.at, nationalbibliothek.at, www.onb.ac.at, wissensportal.onb.ac.at, personal.onb.ac.at, www.onb.at, forms.onb.ac.at, www.nationalbibliothek.at

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 13 · H3 4

Links

396 internal · 20 external · 18 broken

Images

16 total · 0 missing alt

Scripts / Styles

6 scripts · 1 stylesheets

JS / CSS size

3.2 KB · 81 B

Page size

1.4 MB

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 structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://onb.ac.at
Final URL: https://www.onb.ac.at/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 8.87 s
HTML size: 1.4 MB
Redirect chain: https://onb.ac.at → https://www.onb.ac.at/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does onb.ac.at use?: onb.ac.at is built with Apache.
Is onb.ac.at secure (HTTPS)?: Yes. onb.ac.at uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Mar 9, 2027.
Who hosts onb.ac.at?: Hosting provider information for onb.ac.at is not available yet.
What is onb.ac.at's SEO score?: onb.ac.at scored 75/100 for SEO in the latest analysis (fair).
What is onb.ac.at's overall website score?: onb.ac.at has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.