Is esm.sh Safe? Security Analysis for esm.sh
Check if esm.sh is a scam or legitimate. Free security scan and reviews.
AI Summary
esm.sh is a specialized open source CDN service focused on delivering modern ES module JavaScript packages optimized for browsers and Deno environments. Founded in 2020 and hosted on Cloudflare, it provides developers with a fast, smart, and global platform to import JavaScript, TypeScript, Vue, and Svelte modules without build steps. The service supports advanced features such as import maps, dependency aliasing, web worker modules, and Deno compatibility, positioning it as a niche but valuable tool in the modern web development ecosystem. The website is well-structured, with clear documentation and examples targeting developers and technical users.
Detected Technologies
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
The business model centers on providing a free, open source CDN service that leverages Cloudflare's infrastructure for global performance. The target audience includes JavaScript and TypeScript developers, especially those using modern ES modules and Deno. The project is community-driven with a GitHub repository, indicating transparency and collaborative development. The lack of direct contact information and formal policies suggests a small team or individual maintainer. The service's competitive advantage lies in its seamless integration with modern JavaScript workflows and support for on-the-fly transformations, which reduces developer friction. Growth potential depends on adoption within the developer community and possible monetization or sponsorship models.
Security Posture Analysis
Comprehensive Security Assessment
The website enforces HTTPS and uses Cloudflare CDN, providing strong baseline security and performance. Domain registration is privacy protected but consistent with legitimate tech projects. However, the site lacks published privacy policies, cookie consent mechanisms, security policies, and incident response contacts, which are important for compliance and trust. No DNSSEC is enabled, which is a recommended security enhancement. Google Analytics is used, but no explicit data retention or privacy compliance information is provided. Overall, the security posture is good technically but lacks formal documentation and transparency on privacy and incident handling.
Strategic Recommendations
Priority Actions for Security Improvement
Publish a comprehensive privacy policy and cookie policy to improve GDPR and privacy compliance.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
esm.sh
A fast, smart & global CDN for modern (es2015+) web development allowing import of JavaScript modules from URLs without build steps.
good
consistent
Technical Stack
fast
good
good
good
Security Assessment
- HTTPS enforced
- Domain status includes clientDeleteProhibited, clientRenewProhibited, clientTransferProhibited, clientUpdateProhibited
- Auto-renew enabled
- No DNSSEC (not enabled)
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is a technical documentation and service portal for esm.sh CDN.
🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Strict-Transport-Security header
HIGHForces HTTPS connections
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Missing X-Content-Type-Options header
MEDIUMPrevents MIME type sniffing
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Missing Referrer-Policy header
LOWControls referrer information sent with requests
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
Sensitive data may be cached
LOWCache-Control header should include "no-store" for sensitive pages
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Privacy Policy found
HIGHGDPR requires a clear and accessible privacy policy
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
Third-party services without privacy policy
HIGHDetected services: Google Analytics, Cloudflare
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
HIGHDetected sectors: energy, transport, digital
📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
DMARC not enforcing
MEDIUMDMARC policy is set to "none"
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 81 days
Weak SSL Key Length
HIGHSSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
LOWCompleted 2 of 4 security checks due to time constraints
Certificate Details
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
DMARC Policy Set to None
LOWDMARC is configured but not enforcing any policy
Domain Registration Details
- •Privacy/proxy registration detected
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings