modernizr.com

Modernizr: the feature detection library for HTML5/CSS3

Last scanned Jul 26, 2026, 4:17 PM · 1 view

82

Overall score

Great

Summary

This website uses Google Analytics hosted on AWS behind Netlify CDN. 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.

United States

Hosted on AWS

Top issues to fix

10 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.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+4 more issues — details in the sections below.

60

SEO

6 issue(s) found

100

Performance

65 ms

75

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

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

X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)X (Twitter)

Meta tags

Title: Modernizr: the feature detection library for HTML5/CSS3
Description
Canonical
Language: en
Charset: utf-8
Viewport: width=device-width,initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

Google Analytics

Hosting & CDN

Hosting provider: AWS
CDN provider: Netlify
IP address: 75.2.60.5
ASN: AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

Type	Value
A	75.2.60.5
AAAA	—
MX	eforward4.registrar-servers.com eforward3.registrar-servers.com eforward5.registrar-servers.com eforward2.registrar-servers.com eforward1.registrar-servers.com
TXT	v=spf1 include:spf.efwd.registrar-servers.com ~all
NS	dns2.registrar-servers.com dns1.registrar-servers.com
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: modernizr.com
Valid from: Jun 30, 2026
Valid to: Sep 28, 2026
Days until expiry: 61
SAN domains: modernizr.com

Security headers

Strict-Transport-SecurityEnabled
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 0 · H3 6

Links

15 internal · 14 external · 1 broken

Images

0 total · 0 missing alt

Scripts / Styles

3 scripts · 2 stylesheets

JS / CSS size

17.5 KB · 13.4 KB

Page size

5.3 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://modernizr.com
Final URL: https://modernizr.com
HTTP status: 200
HTTP version: HTTP/2
Response time: 65 ms
HTML size: 5.3 KB
Redirect chain: https://modernizr.com

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Frequently asked questions

What technology does modernizr.com use?: modernizr.com is built with Google Analytics.
Is modernizr.com secure (HTTPS)?: Yes. modernizr.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 28, 2026.
Who hosts modernizr.com?: modernizr.com is hosted on AWS, behind Netlify CDN.
What is modernizr.com's SEO score?: modernizr.com scored 60/100 for SEO in the latest analysis (fair).
What is modernizr.com's overall website score?: modernizr.com has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.