shouldiuse.io

Comparison

jsDelivr vs cdnjs

jsDelivr and cdnjs both land on Worth it.

cdnjs

cdnjs.com

Worth it
Confidence: Medium

Use it if you need a free, zero-maintenance way to serve popular open-source libraries . Cloudflare's network makes it dependable.

Read the full report

jsDelivr versus cdnjs
ComparejsDelivrcdnjs
VerdictWorth itWorth it
Best forOpen-source library authorsFrontend devs serving popular JS/CSS libraries
Who it's not forCommercial apps needing SLAs or support contractsGDPR-strict or privacy-sensitive sites . third-party scripts share visitor IPs
PrivacyNo CVEs against the service itself in sources; a 2023 incident served already-removed malicious npm packages used in phishing.⁹Infrastructure is hardened (HSTS preloaded), but cdnjs suffered a critical RCE in 2021 . patched; concentration risk remains.
Support qualityNo support-quality evidence in sourcesCommunity-run open source; no SLA
Public sentimentUsers on Reddit and G2 call it one of the best free JS CDNs for offloading scripts, but complain when outages and 404s break their sites.⁵Developers treat cdnjs as the dependable free default, but a vocal contingent now argues public CDNs create more risk than benefit.
Biggest gotchaFree means no SLA: its outages and 404s become your site's incidents. Pin exact versions.12Supply-chain concentration: one cdnjs compromise reaches every site using it . 2021 proved the risk

Pick jsDelivr when

  • Open-source library authors
  • Front-end devs loading npm/GitHub files
  • Demos, docs, and prototypes
  • Offloading static JS from small servers

When jsDelivr is not a fit

  • Commercial apps needing SLAs or support contracts
  • First-party production assets with uptime guarantees
  • Teams that can't accept third-party dependency on critical paths
  • Enterprises wanting vendor accountability and contracts

Pick cdnjs when

  • Frontend devs serving popular JS/CSS libraries
  • Prototypes, demos, and small business sites
  • Docs and blogs wanting zero build tooling
  • Open-source projects distributing browser builds

When cdnjs is not a fit

  • GDPR-strict or privacy-sensitive sites . third-party scripts share visitor IPs
  • Mission-critical apps that cannot tolerate third-party outages . self-host
  • Private or custom code . cdnjs hosts public open-source libraries only
  • Teams needing SLAs or vendor support . none exists

Sources

  1. jsdelivr/jsdelivr . GitHub repogithub.com
    official
  2. jsDelivr homepagejsdelivr.com
    official
  3. Our Network . jsDelivrjsdelivr.com
    official
  4. JSDelivr . Wikipediaen.wikipedia.org
    news
  5. jsDelivr Reviews . G2g2.com
    review
  6. Just a short review: jsDelivr seems be the best CDN . Redditreddit.com
    review
  7. jsdelivr cdn is down . Reddit r/webdevreddit.com
    review
  8. jsDelivr Overview, Reviews, Pricing . TrustRadiustrustradius.com
    review
  9. CDN Service Exposes Users to Malicious Packages . Check Pointblog.checkpoint.com
    security
  10. Global CDN Service 'jsdelivr' Exposed Users to Phishing . Hackreadhackread.com
    security
  11. CDN Detected (JsDelivr) . Invictiinvicti.com
    security
  12. cdn.jsdelivr.net returning 404 . GitHub issue #18150github.com
    news
  13. jsdelivr . Crunchbasecrunchbase.com
    news
  14. Top 4 CDN services for hosting open source libraries . opensource.comopensource.com
    news
  15. cdnjs official sitecdnjs.com
    official
  16. Migrating cdnjs to Cloudflare's Developer Platformblog.cloudflare.com
    official