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SGSiteGraph

noirlab.edu

NOIRLab

Last scanned Aug 3, 2026, 10:00 AM · 5 views

77

Overall score

Fair

Summary

This website uses Nginx. SEO is fair (55/100) and accessibility is excellent (90/100). Security scores fair (70/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

11 issues found · 4 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.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • 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-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.

+5 more issues — details in the sections below.

55

SEO

6 issue(s) found

100

Performance

776 ms

70

Security

HTTPS & header checks

90

Accessibility

1 issue(s) found

Score history

-2 overall since Jul 26, 2026

Overall
77
SEO
55
Security
70
Performance
100
Accessibility
90

Organization

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

FacebookX (Twitter)InstagramYouTubeLinkedIn

Contact

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

Meta tags

Title
NOIRLab
Description
Canonical
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
NOIRLab / NSF National Optical-IR Astronomy Research Laboratory
og:description
NSF National Optical-Infrared Astronomy Research Laboratory (NSF NOIRLab) is the preeminent US national center for ground-based, nighttime optical and infrared astronomy
og:type
—
og:url
—

Twitter Card

twitter:card
summary
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

Nginx

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.2
Issuer
Amazon
Subject
noirlab.edu
Valid from
Oct 14, 2025
Valid to
Nov 12, 2026
Days until expiry
101
SAN domains
noirlab.edu, www.noirlab.edu, wwwedit.noirlab.edu

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 34 · H3 20

Links

442 internal · 9 external · 20 broken

Images

61 total · 0 missing alt

Scripts / Styles

4 scripts · 4 stylesheets

JS / CSS size

1.3 KB · 0 B

Page size

132 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 H1 heading found
  • No structured data (JSON-LD) found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://noirlab.edu
Final URL
https://noirlab.edu/public/
HTTP status
200
HTTP version
HTTP/2
Response time
774 ms
HTML size
132 KB
Redirect chain
https://noirlab.edu → https://noirlab.edu/public/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does noirlab.edu use?
noirlab.edu is built with Nginx.
Is noirlab.edu secure (HTTPS)?
Yes. noirlab.edu uses TLS 1.2 with a certificate issued by Amazon, valid until Nov 12, 2026.
Who hosts noirlab.edu?
Hosting provider information for noirlab.edu is not available yet.
What is noirlab.edu's SEO score?
noirlab.edu scored 55/100 for SEO in the latest analysis (fair).
What is noirlab.edu's overall website score?
noirlab.edu has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.
Has noirlab.edu's score changed over time?
noirlab.edu's overall score has declined by 2 points (from 79 to 77) since Jul 26, 2026.