What technology does hal.science use?

hal.science is built with Nginx.

Is hal.science secure (HTTPS)?

Yes. hal.science uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 7, 2027.

Who hosts hal.science?

Hosting provider information for hal.science is not available yet.

What is hal.science's SEO score?

hal.science scored 60/100 for SEO in the latest analysis (fair).

What is hal.science's overall website score?

hal.science has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.

Has hal.science's score changed over time?

hal.science's overall score has declined by 3 points (from 85 to 82) since Jul 24, 2026.

hal.science

Accueil - Archive ouverte HAL

Last scanned Jul 31, 2026, 9:00 PM · 7 views

Overall score

Great

Summary

This website uses Nginx. SEO is fair (60/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

11 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.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.

+5 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

223 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 24, 2026

Overall: 82
SEO: 60
Security: 75
Performance: 100
Accessibility: 100

Meta tags

Title: Accueil - Archive ouverte HAL
Description
Canonical
Language: fr
Charset: UTF-8
Viewport: width=device-width, initial-scale=1, shrink-to-fit=no
Robots meta
Manifest: https://hal.science/assets/site.webmanifest

Technologies

Detected frameworks, languages, and tools.

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: Hellenic Academic and Research Institutions CA
Subject: *.hal.science
Valid from: Jul 23, 2026
Valid to: Feb 7, 2027
Days until expiry: 190
SAN domains: *.hal.science, hal.science

Security headers

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

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 1 · H2 7 · H3 2

Links

16 internal · 35 external · 20 broken

Images

9 total · 0 missing alt

Scripts / Styles

16 scripts · 4 stylesheets

JS / CSS size

2.9 KB · 0 B

Page size

30.5 KB

Robots.txt & Sitemap

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

SEO issues

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

Scan details

Requested URL: https://hal.science
Final URL: https://hal.science
HTTP status: 200
HTTP version: HTTP/2
Response time: 223 ms
HTML size: 30.5 KB
Redirect chain: https://hal.science

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does hal.science use?: hal.science is built with Nginx.
Is hal.science secure (HTTPS)?: Yes. hal.science uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 7, 2027.
Who hosts hal.science?: Hosting provider information for hal.science is not available yet.
What is hal.science's SEO score?: hal.science scored 60/100 for SEO in the latest analysis (fair).
What is hal.science's overall website score?: hal.science has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
Has hal.science's score changed over time?: hal.science's overall score has declined by 3 points (from 85 to 82) since Jul 24, 2026.

Top issues to fix

Score history

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions