Skip to content

core-js vs Modernizr

Based on 1841 and 302 real audits

View core-js details | View Modernizr details
Metriccore-jsModernizrWinner
Performance3744Modernizr
Accessibility8885core-js
Best Practices8587Modernizr
SEO9190core-js
Security6766core-js
TTFB439ms416msModernizr
Composite7474Tie
Performance
core-js
37
Modernizr
44
Accessibility
core-js
88
Modernizr
85
Security
core-js
67
Modernizr
66
SEO
core-js
91
Modernizr
90
Composite
core-js
74
Modernizr
74

core-js and Modernizr are closely matched, each leading in different categories. core-js has a composite score of 74 while Modernizr scores 74.

When to choose core-js

Choose core-js when your primary concern is accessibility and SEO. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Modernizr

Choose Modernizr when your primary concern is server response time and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1841 audited core-js sites and 302 audited Modernizr sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

FAQ

Which is faster, core-js or Modernizr?
Based on real BeaverCheck audits, Modernizr sites score higher on Lighthouse performance (44 vs 37 on average).
Which has better security, core-js or Modernizr?
core-js sites score higher on security analysis (67 vs 66 on average).
Which has better accessibility, core-js or Modernizr?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 85). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, core-js or Modernizr?
core-js sites score higher on Lighthouse SEO signals (91 vs 90 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), core-js or Modernizr?
Modernizr sites show lower Time to First Byte (416 ms vs 439 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose core-js or Modernizr for my website?
Both platforms have trade-offs. Modernizr scores higher on overall composite score while core-js may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
Audit your own site

Send Feedback