61
GoodObject schema validation
- Weekly Downloads
- 0
Trend data unavailable
- Bundle (gzip)
- 553.8 KB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
80
Popularity
10
Quality
50
Security
100
Stability
70
Comparison guide
Joi vs Zod
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Joi
553.8 KB gzipped
Most Popular
Joi
0 weekly downloads
Best Maintained
Zod
100/100 maintenance score
Highest Quality
Zod
80/100 quality score
Overall Pick
Joi
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)
- 1.3 MB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
100
Popularity
10
Quality
80
Security
100
Stability
70
Choosing between Joi 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
Joi and Zod both have 0 weekly downloads, indicating equal adoption in the ecosystem.
Bundle Size
Joi has the smallest gzipped bundle at 553.8 KB. Zod comes in at 1.3 MB. 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. Joi has an overall health score of 61/100 (good), with strong maintenance, security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Joi if you value strong security track record. Choose Zod if you value actively maintained, strong security track record.
Our Verdict
Both Joi 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 joi better than zod?
- It depends on your needs. Joi has a health score of 61/100 while Zod scores 74/100. Joi 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, joi or zod?
- Joi has the smaller gzipped bundle at 553.8 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use joi vs zod?
- Based on npm download statistics, Joi 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, joi or zod?
- Zod currently has the higher overall health score at 74/100. Joi has a maintenance score of 80/100 and Zod scores 100/100 on maintenance.
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The 2026 JavaScript Stack Cheatsheet
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