How do I generate a UUID online?

Click Generate on the UUID Generator to instantly create a random UUID v4. You can generate up to 100 UUIDs at once and copy them all.

A UUID (Universally Unique Identifier) is a 128-bit label in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. It is designed to be globally unique without a central registry.

What is the difference between UUID v1 and v4?

UUID v1 is generated from the current timestamp and MAC address, making it traceable. UUID v4 is completely random, making it the most widely used version for privacy.

Are UUIDs truly unique?

UUID v4 has 2^122 possible values. The probability of generating two identical UUIDs is astronomically low — effectively unique for all practical purposes.

Can I use UUIDs as database primary keys?

Yes, UUIDs are excellent as primary keys when you need globally unique IDs across distributed systems, though they are larger than auto-increment integers.

UUID Generator – Dev Tools Online — Free Developer Utilities

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Quick Answer

A UUID (Universally Unique Identifier) is a 128-bit random identifier in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, designed to be unique across all systems without a central registry. Click Generate to create one or more UUID v4 values for your database, API, or application.

Generate RFC 4122 UUIDs. Choose v1 (time-based) or v4 (random). Bulk generate up to 100.

Version

Count (1–100)

Generated UUIDs

Cite This Tool

UUID Generator. (2026). DevTools Online. Retrieved from https://devutilitypro.com/uuid-generator/

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