Ulid vs Uuid

Side-by-side NPM package comparison

ulid

Very Popular

Version 3.0.2

79
Good

A universally-unique, lexicographically-sortable, identifier generator

Weekly Downloads
4.8M
↑50%
Bundle (gzip)
20.3 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
80
Popularity
100
Quality
50
Security
100
Stability
70

uuid

Extremely Popular

Version 13.0.0

73
Good

RFC9562 UUIDs

Weekly Downloads
217.4M
↑30%
Bundle (gzip)
19.5 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
60
Popularity
100
Quality
50
Security
100
Stability
70

Choosing between Ulid and Uuid? 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

Uuid leads with 217.4M weekly downloads — roughly 45.5x more. Ulid has 4.8M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.

Bundle Size

Uuid has the smallest gzipped bundle at 19.5 KB. Ulid comes in at 20.3 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.

Health Score Comparison

Ulid has an overall health score of 79/100 (very good), with strong maintenance, security, popularity scores. Uuid has an overall health score of 73/100 (good), with strong security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.

When to Choose Each

Choose Ulid if you value large community support, strong security track record. Choose Uuid if you value massive community and ecosystem, strong security track record.

Our Verdict

Both Ulid and Uuid are solid choices for JavaScript development. Ulid has the edge in overall health score (79/100), 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 ulid better than uuid?
It depends on your needs. Ulid has a health score of 79/100 while Uuid scores 73/100. Uuid has more weekly downloads (217.4M), 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, ulid or uuid?
Uuid has the smaller gzipped bundle at 19.5 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
How many developers use ulid vs uuid?
Based on npm download statistics, Ulid has approximately 4.8M weekly downloads and Uuid has approximately 217.4M weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
Which is better maintained, ulid or uuid?
Ulid currently has the higher overall health score at 79/100. Ulid has a maintenance score of 80/100 and Uuid scores 60/100 on maintenance.

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