UUID Version Guide and Comparison
Not all UUIDs are created equal. Discover which version is right for your project and generate the perfect identifier today.
When to use this solution:
Use this during the technical design phase of your project to choose the correct identifier strategy.
Common Use Cases
1Step-by-Step Guide
Compare v1 (Time-based)
Use if you need chronologically sortable identifiers (but beware of MAC address exposure).
Review v4 (Random)
The go-to for privacy and maximum uniqueness with no external data requirements.
Check v5 (Named-based)
Best when you need a consistent ID generated from a specific string.
Generate V4 UUIDs
Simply use our generator to produce cryptographically strong V4 identifiers for your project.
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Generate V4 UUIDFrequently Asked Questions
Why is v4 the most popular?
Because it's purely random, doesn't leak any device info, and is extremely easy to implement.
Can I switch versions later?
It's difficult once data is stored. It's better to pick one at the start and stick with it.