UUID Generator
Create random UUIDs in standard format for keys, resource IDs and technical workflows without a server.
Generate UUID v4 values instantly in the browser. Copy unique identifiers for testing, prototypes, and integrations.
Generated UUID
UUID generation happens in your browser. No data is sent to any server.
Quick answer
A UUID (Universally Unique Identifier) V4 is a 128-bit identifier created randomly. It is useful for resource keys, session IDs and technical tests when you need reliable unique values.
How to use the UUID generator
Select how many UUIDs you want, choose uppercase formatting and whether to keep hyphens. Then click generate to get one or more identifiers ready to copy.
Available options
This tool generates UUID v4 values directly in the browser. You can adjust quantity, display format and quickly copy the result.
How the UUID is generated
UUID v4 uses cryptographic randomness (crypto.getRandomValues) to create 128 bits. The bits are adjusted to indicate version 4 and the standard UUID variant.
Practical example
If you generate a UUID with hyphens, the standard output looks like: 550e8400-e29b-41d4-a716-446655440000. Without hyphens, it becomes: 550e8400e29b41d4a716446655440000.
How to interpret and use the UUID
UUIDs are used as unique IDs in databases, APIs, temporary tokens and file identifiers. They do not rely on predictable sequences and are suitable for distributed systems.
Useful tips
Use locally generated UUIDs for tests and prototypes. For production systems, verify whether your backend expects UUID v1, v4 or a custom identifier format.
Frequently asked questions
What is a UUID?
A UUID is a universally unique identifier with 128 bits used to distinguish resources and data globally.
Which UUID version does this generator use?
This generator produces UUID version 4, based on cryptographic randomness.
Can I use this UUID in production?
Yes, UUID v4 values are widely used. For compliance or business rules, check with your backend requirements.