cdn.jsdelivr.net
jsDelivr - A free, fast, and reliable CDN for JS and open source
Last scanned Jul 23, 2026, 12:52 PM
Overall score
Great
Summary
Optimized for JS and ESM delivery from npm and GitHub. This website uses jQuery hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (90/100) and accessibility is fair (70/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.
jsDelivr
Optimized for JS and ESM delivery from npm and GitHub. Works with all web formats. Serving more than 150 billion requests per month.
- United States
- 5 employees
- Hosted on Cloudflare
Top issues to fix
6 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
SEO
2 issue(s) found
Performance
523 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
jsDelivr
Optimized for JS and ESM delivery from npm and GitHub. Works with all web formats. Serving more than 150 billion requests per month.
- Founded
- Apr 10, 2012
- Employees
- 5
Contact
Email, phone, and address published on this site's own pages.
- d@jsdelivr.com
Meta tags
- Title
- jsDelivr - A free, fast, and reliable CDN for JS and open source
- Description
- Optimized for JS and ESM delivery from npm and GitHub. Works with all web formats. Serving more than 150 billion requests per month.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://www.jsdelivr.com/icons/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.21.8.91
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- jsdelivr.com
- Valid from
- Jul 20, 2026
- Valid to
- Oct 18, 2026
- Days until expiry
- 86
- SAN domains
- jsdelivr.com, *.jsdelivr.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 1 · H3 6
Links
50 internal · 22 external · 0 broken
Images
76 total · 76 missing alt
Scripts / Styles
15 scripts · 2 stylesheets
JS / CSS size
1.5 KB · 708 B
Page size
47.8 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Title longer than 60 characters
- Missing canonical link
Accessibility issues
- Over half of images are missing alt text
Team
People listed on this site's own team or about page.
Scan details
- Requested URL
- https://cdn.jsdelivr.net
- Final URL
- https://www.jsdelivr.com
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 523 ms
- HTML size
- 47.8 KB
- Redirect chain
- https://cdn.jsdelivr.net → https://www.jsdelivr.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does cdn.jsdelivr.net use?
- cdn.jsdelivr.net is built with jQuery.
- Is cdn.jsdelivr.net secure (HTTPS)?
- Yes. cdn.jsdelivr.net uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 18, 2026.
- Who hosts cdn.jsdelivr.net?
- cdn.jsdelivr.net is hosted on Cloudflare, behind Cloudflare CDN.
- What is cdn.jsdelivr.net's SEO score?
- cdn.jsdelivr.net scored 90/100 for SEO in the latest analysis (excellent).
- What is cdn.jsdelivr.net's overall website score?
- cdn.jsdelivr.net has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
- What company operates cdn.jsdelivr.net?
- cdn.jsdelivr.net is operated by jsDelivr. Optimized for JS and ESM delivery from npm and GitHub. Works with all web formats. Serving more than 150 billion requests per month.
OpenGraph & Twitter Card
OpenGraph
Twitter Card