esm.sh
ESM>CDN
Last scanned Jul 26, 2026, 2:25 AM · 1 view
Overall score
Great
Summary
A fast, smart & global CDN for modern(es2015+) web development. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
A fast, smart & global CDN for modern(es2015+) web development.
- United States
- Hosted on Cloudflare
Top issues to fix
8 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.
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.
+2 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
221 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
A fast, smart & global CDN for modern(es2015+) web development.
Contact
Email, phone, and address published on this site's own pages.
Source: https://esm.sh/support
Meta tags
- Title
- ESM>CDN
- Description
- A fast, smart & global CDN for modern(es2015+) web development.
- Canonical
- Language
- en
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.14.209
- 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
- esm.sh
- Valid from
- Jun 21, 2026
- Valid to
- Sep 19, 2026
- Days until expiry
- 55
- SAN domains
- esm.sh, *.esm.sh
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 6 · H3 18
Links
2 internal · 27 external · 2 broken
Images
4 total · 0 missing alt
Scripts / Styles
4 scripts · 1 stylesheets
JS / CSS size
237 B · 0 B
Page size
66.1 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Careers
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://esm.sh
- Final URL
- https://esm.sh
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 220 ms
- HTML size
- 66.1 KB
- Redirect chain
- https://esm.sh
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does esm.sh use?
- esm.sh is built with Svelte, Google Analytics.
- Is esm.sh secure (HTTPS)?
- Yes. esm.sh uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 19, 2026.
- Who hosts esm.sh?
- esm.sh is hosted on Cloudflare, behind Cloudflare CDN.
- What is esm.sh's SEO score?
- esm.sh scored 80/100 for SEO in the latest analysis (great).
- What is esm.sh's overall website score?
- esm.sh has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
- Is esm.sh hiring?
- esm.sh has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card