jeffco.us
Jefferson County, CO | Official Website
Last scanned Jul 27, 2026, 9:43 AM
Overall score
Great
Summary
The home page for Jefferson County Colorado. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing canonical link.
The home page for Jefferson County Colorado.
- United States
- Hosted on Cloudflare
Top issues to fix
7 issues found
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
5 issue(s) found
Performance
81 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
The home page for Jefferson County Colorado.
Contact
Email, phone, and address published on this site's own pages.
- Phone
- 303-271-6511
Meta tags
- Title
- Jefferson County, CO | Official Website
- Description
- The home page for Jefferson County Colorado.
- Canonical
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.64.154.71
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- www.jeffco.us
- Valid from
- Jul 4, 2026
- Valid to
- Oct 2, 2026
- Days until expiry
- 66
- SAN domains
- www.jeffco.us
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 4 · H3 7
Links
50 internal · 8 external · 19 broken
Images
8 total · 0 missing alt
Scripts / Styles
53 scripts · 9 stylesheets
JS / CSS size
496 KB · 93.1 KB
Page size
130 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 structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://jeffco.us
- Final URL
- https://www.jeffco.us/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 79 ms
- HTML size
- 130 KB
- Redirect chain
- https://jeffco.us → https://www.jeffco.us/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does jeffco.us use?
- jeffco.us is built with jQuery, Google Analytics.
- Is jeffco.us secure (HTTPS)?
- Yes. jeffco.us uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 2, 2026.
- Who hosts jeffco.us?
- jeffco.us is hosted on Cloudflare, behind Cloudflare CDN.
- What is jeffco.us's SEO score?
- jeffco.us scored 70/100 for SEO in the latest analysis (fair).
- What is jeffco.us's overall website score?
- jeffco.us has an overall SiteGraph score of 89/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card