49
FairDead simple Object schema validation
- Weekly Downloads
- 0
Trend data unavailable
- Bundle (gzip)
- 13.1 KB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
40
Popularity
10
Quality
50
Security
100
Stability
70
Comparison guide
Yup vs Zod
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Yup
13.1 KB gzipped
Most Popular
Yup
0 weekly downloads
Best Maintained
Zod
100/100 maintenance score
Highest Quality
Zod
80/100 quality score
Overall Pick
Zod
Best all-around based on popularity, size, maintenance & quality
74
GoodTypeScript-first schema declaration and validation library with static type inference
- Weekly Downloads
- 0
Trend data unavailable
- Bundle (gzip)
- 60.3 KB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
100
Popularity
10
Quality
80
Security
100
Stability
70
Choosing between Yup and Zod? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.
Downloads & Popularity
Yup and Zod both have 0 weekly downloads, indicating equal adoption in the ecosystem.
Bundle Size
Yup has the smallest gzipped bundle at 13.1 KB. Zod comes in at 60.3 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Zod has an overall health score of 74/100 (good), with strong maintenance, quality, security scores. Yup has an overall health score of 49/100 (moderate), with strong security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Yup if you value strong security track record. Choose Zod if you value actively maintained, strong security track record.
Our Verdict
Both Yup and Zod are solid choices for JavaScript development. Zod has the edge in overall health score (74/100), while each package brings unique strengths to the table. Evaluate them based on your project's priorities — whether that's community size, bundle efficiency, or maintenance activity — and choose the one that aligns best with your requirements.
Frequently Asked Questions
- Is yup better than zod?
- It depends on your needs. Yup has a health score of 49/100 while Zod scores 74/100. Yup has more weekly downloads (0), suggesting broader adoption. Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, yup or zod?
- Yup has the smaller gzipped bundle at 13.1 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use yup vs zod?
- Based on npm download statistics, Yup has approximately 0 weekly downloads and Zod has approximately 0 weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
- Which is better maintained, yup or zod?
- Zod currently has the higher overall health score at 74/100. Yup has a maintenance score of 40/100 and Zod scores 100/100 on maintenance.
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The 2026 JavaScript Stack Cheatsheet
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