Recommendation

Proceed

Overall Summary

Safe

Why we think so

jsdelivr.net is a recognized content delivery network (CDN) popular for hosting and distributing JavaScript and CSS files. It serves over 1.2 million visits monthly, primarily from China (27%), the US (13%), and India (8%), with users spending about 94 seconds per visit and an average of 2.24 pages viewed per session. The domain was registered in 2012 through Amazon Registrar and maintains typical DNS and WHOIS records for a reliable CDN. No trademarks are registered that conflict with its name. While the site itself is not blacklisted and passes Google's Safe Browsing checks, jsdelivr.net has been involved in security incidents mainly due to external abuse, including impersonation by a similar-looking domain and hosting malicious npm packages cached on its CDN. These issues have been addressed collaboratively, but they highlight supply chain risks common to open-source services. Overall, jsdelivr.net is generally regarded as legitimate and safe, though developers should use standard security practices such as integrity checks and vigilance for abuse.

Confidence Score

80%

Risk Insights

🛡️

Established Domain and DNS Setup

Registered in 2012 with Amazon Registrar

Standard DNS and WHOIS records

No registrar abuse flags

📊

Stable and Legitimate Traffic Patterns

1.2M monthly visits

Mainly direct and referral traffic

Primary users from China, US, India

⚠️

External Abuse Incidents Reported

Typosquatting domain caused phishing issues

Malicious npm packages cached temporarily

Issues addressed by developers

Contradictory Signals

While jsdelivr.net itself is legitimate, its infrastructure has been abused by attackers exploiting the CDN features.

Signal A: High trust site with long domain history

Signal B: Security incidents from CDN abuse and typosquatting

Category Scores

Identity 85/100

Reputation 75/100

Technical 80/100

Content 70/100

Legal 90/100

Business Validity 80/100

Red Flags & Warnings

Historic incidents of domain impersonation via cdn.jsdeliver.net injecting malicious scripts.
Malicious npm packages cached on the CDN after removal led to phishing attacks.

🔎 Detailed Checks & Analysis

Domain Ownership and Age Check

Score: 90/100

Passed

"Registered with Amazon Registrar since 2012; WHOIS info consistent and no unusual flags."

Reason: jsdelivr.net domain was registered in 2012 through a reputable registrar and appears stable.

Traffic and Usage Analysis

Score: 75/100

Passed

"Majority traffic direct or from referrals; global user base with expected bounce rate (55%)."

Reason: Over 1.2 million visits monthly with typical engagement metrics and no suspicious spikes.

Blacklist and Security Flags

Score: 90/100

Passed

"No malware or phishing detected in major security databases as of latest scans."

Reason: Site is not listed on Google Safe Browsing or crypto scam blacklists, indicating good standing.

Trademark and Brand Verification

Score: 85/100

Passed

"USPTO search reveals zero conflicting trademarks for the name."

Reason: No trademark conflicts found for 'jsdelivr' reducing impersonation risks.

Reputation and Scam Reports

Score: 70/100

Passed

"Incidents stem from third-party abuse rather than service misuse; mitigations underway."

Reason: Reviews praise service performance, though some external abuse reported via typosquatting and malicious cached packages.

Your Next Steps

1

Developers should verify npm packages before use and apply Subresource Integrity (SRI) checks when loading resources from jsdelivr.net.
2

Monitor for similar or lookalike domains that may attempt phishing or malware distribution.
3

Stay updated on supply chain security advisories related to open-source CDN services like jsdelivr.net.

Evidence & Citations

jsDelivr Forum: Issue #18070 - Typosquatting Attack
Reports on fake mirror domain injecting malicious JS.
Global CDN Service Exposes Users to Phishing Attacks
Details phishing campaigns abusing cached malicious npm packages.
jsDelivr Whois and DNS Information
Domain registered 2012 at Amazon Registrar with normal DNS setup.
SimilarWeb Analytics for jsdelivr.net
Traffic and engagement statistics as of December 2025 show stable usage.
Google Safe Browsing and Crypto Scam Checks
jsdelivr.net cleared of phishing or scam listings.

🕵🏻 Keep investigating

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