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SGSiteGraph

sdss3.org

SDSS-III

Last scanned Aug 3, 2026, 10:00 PM · 12 views

78

Overall score

Fair

Summary

This website uses Nginx hosted on Fastly behind Fastly CDN. SEO is fair (65/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

United States
Hosted on Fastly

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.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • 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.

+5 more issues — details in the sections below.

65

SEO

5 issue(s) found

100

Performance

230 ms

65

Security

HTTPS & header checks

85

Accessibility

2 issue(s) found

Score history

+3 overall since Jul 26, 2026

Overall
78
SEO
65
Security
65
Performance
100
Accessibility
85

Organization

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

X (Twitter)

Contact

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

Source: https://sdss3.org/contact.php

Meta tags

Title
SDSS-III
Description
Canonical
Language
Charset
utf-8
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

jQueryGoogle AnalyticsNginx

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
23.185.0.4
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 23.185.0.4
AAAA—
MX
  • mail.inscc.utah.edu
TXT
  • 9726F3E27B578DFC6A8484E4DFBC4A1E
NS
  • ens1.jhu.edu
  • ens1.jhmi.edu
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
sdss3.org
Valid from
Jun 25, 2026
Valid to
Sep 23, 2026
Days until expiry
50
SAN domains
sdss3.org, www.sdss3.org

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 2 · H3 3

Links

22 internal · 29 external · 0 broken

Images

24 total · 0 missing alt

Scripts / Styles

11 scripts · 2 stylesheets

JS / CSS size

227 KB · 19.0 KB

Page size

12.0 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
4
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
  • sitemap.xml not found

Accessibility issues

  • Missing <html lang> attribute
  • Missing viewport meta tag

Careers

View careers page

This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.

Scan details

Requested URL
https://sdss3.org
Final URL
https://sdss3.org
HTTP status
200
HTTP version
HTTP/2
Response time
230 ms
HTML size
12.0 KB
Redirect chain
https://sdss3.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does sdss3.org use?
sdss3.org is built with jQuery, Google Analytics, Nginx.
Is sdss3.org secure (HTTPS)?
Yes. sdss3.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 23, 2026.
Who hosts sdss3.org?
sdss3.org is hosted on Fastly, behind Fastly CDN.
What is sdss3.org's SEO score?
sdss3.org scored 65/100 for SEO in the latest analysis (fair).
What is sdss3.org's overall website score?
sdss3.org has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.
Has sdss3.org's score changed over time?
sdss3.org's overall score has improved by 3 points (from 75 to 78) since Jul 26, 2026.
Is sdss3.org hiring?
sdss3.org has a careers page; check it directly for current openings.