codehs.com
The Top Coding and Computer Science Platform for K-12 Schools | CodeHS
Last scanned Aug 6, 2026, 2:00 AM · 10 views
Overall score
Fair
Summary
CodeHS is the comprehensive K-12 platform for computer science, AI, and digital literacy — free curriculum, IDE, grading tools, and professional development for schools and districts nationwide. This website uses Apache hosted on AWS behind CloudFront CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance fair (50/100). Top issue: Title longer than 60 characters.
CodeHS is the comprehensive K-12 platform for computer science, AI, and digital literacy — free curriculum, IDE, grading tools, and professional development for schools and districts nationwide.
- United States
- Hosted on AWS
Top issues to fix
7 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
4 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
+1 more issue — details in the sections below.
SEO
2 issue(s) found
Performance
13 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-7 overall since Jul 26, 2026
- Overall
- 78
- SEO
- 90
- Security
- 75
- Performance
- 50
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
CodeHS is the comprehensive K-12 platform for computer science, AI, and digital literacy — free curriculum, IDE, grading tools, and professional development for schools and districts nationwide.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- The Top Coding and Computer Science Platform for K-12 Schools | CodeHS
- Description
- CodeHS is the comprehensive K-12 platform for computer science, AI, and digital literacy — free curriculum, IDE, grading tools, and professional development for schools and districts nationwide.
- Canonical
- https://codehs.com/
- 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
- AWS
- CDN provider
- CloudFront
- IP address
- 13.225.5.90
- ASN
- AS16509 (AMAZON-02 - Amazon.com, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Amazon
- Subject
- *.codehs.com
- Valid from
- Jun 7, 2026
- Valid to
- Dec 21, 2026
- Days until expiry
- 137
- SAN domains
- *.codehs.com, www.codehighschool.com, codehs.com, *.codehighschool.com, codehighschool.com, www.codehs.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 5 cookie(s) observed
Content & assets
Headings
H1 1 · H2 38 · H3 35
Links
148 internal · 20 external · 1 broken
Images
46 total · 0 missing alt
Scripts / Styles
40 scripts · 12 stylesheets
JS / CSS size
8.5 MB · 5.7 MB
Page size
423 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 110
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://codehs.com
- Final URL
- https://codehs.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 5 ms
- HTML size
- 423 KB
- Redirect chain
- https://codehs.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does codehs.com use?
- codehs.com is built with Django, jQuery, Google Analytics, Google Ads, Apache.
- Is codehs.com secure (HTTPS)?
- Yes. codehs.com uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 21, 2026.
- Who hosts codehs.com?
- codehs.com is hosted on AWS, behind CloudFront CDN.
- What is codehs.com's SEO score?
- codehs.com scored 90/100 for SEO in the latest analysis (excellent).
- What is codehs.com's overall website score?
- codehs.com has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.
- Has codehs.com's score changed over time?
- codehs.com's overall score has declined by 7 points (from 85 to 78) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card