TinyToolHub

UUID Generator

Generate unique identifiers for your applications

Dev Tool
Generate UUIDs
Random UUID (most common)
UUID Validator
Generation Info
Version:
UUID V4
Count:1
Generated:0
Format:8-4-4-4-12
UUID Types
UUID v1

Based on timestamp and MAC address. Predictable but unique.

UUID v4

Randomly generated. Most commonly used version.

UUID v7

Timestamp-ordered for better database performance.

About UUID Generator

A UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. Our UUID generator supports multiple versions:

  • UUID v1: Based on timestamp and MAC address, ensuring uniqueness across time and space
  • UUID v4: Randomly generated, most commonly used for general purposes
  • UUID v7: Timestamp-ordered, optimized for database indexing and sorting

All UUIDs are generated client-side for privacy and security. No data is sent to our servers.

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across both space and time. It's commonly used in software development to identify resources, database records, and distributed systems.

Which UUID version should I use?

UUID v4 is the most commonly used version for general purposes as it's randomly generated. Use UUID v1 if you need timestamp information, or UUID v7 for better database performance with time-ordered IDs.

Are UUIDs truly unique?

While theoretically possible, the probability of generating duplicate UUIDs is extremely low. UUID v4 has approximately 5.3 x 10^36 possible values, making collisions practically impossible.

Can I use UUIDs as database primary keys?

Yes, UUIDs are commonly used as primary keys, especially in distributed systems. UUID v7 is particularly well-suited for this as it maintains chronological ordering.

Is this tool secure and private?

Yes, all UUID generation happens in your browser. No data is transmitted to our servers, ensuring complete privacy and security of your generated identifiers.

What's the difference between UUID and GUID?

UUID and GUID (Globally Unique Identifier) are essentially the same thing. GUID is Microsoft's term for UUID, but they follow the same format and standards.