UUID & GUID Generator
Generate secure UUID v4 and GUID values, copy them in bulk or download them as a file.
UUID values are generated directly in your browser. The generated values are not sent to the server.
UUID generation options
Set the number of UUIDs to generate and the output format.
UUID & GUID Generator features
Quickly create unique identifier values for your software projects, with customizable options.
UUID v4 generation
Creates randomness-based UUID v4 values.
Bulk generation
Generates between 1 and 1000 UUIDs in a single operation.
Letter case
Produces lowercase or uppercase output.
With or without hyphens
Provides standard or compact UUID output.
Quick copy
Copies the generated UUID list to the clipboard.
File download
Downloads the UUID list as a TXT file.
What are UUID and GUID?
UUID is short for “Universally Unique Identifier”. It is a 128-bit identifier used to assign unique identity values to objects in distributed systems, databases, API services and software applications.
GUID is short for “Globally Unique Identifier”. It is widely used, especially in the Microsoft and .NET ecosystem. In practice, the terms UUID and GUID mostly refer to the same identifier format.
The standard UUID representation consists of 32 hexadecimal characters and four hyphens. Including the hyphens, its total length is 36 characters.
How to use the UUID & GUID Generator?
Set the quantity
Enter the number of UUIDs you want to generate.
Choose the format
Select the letter case, hyphen and wrapping options.
Generate the UUIDs
Click the Generate UUID button.
Use the result
Copy them or download them as a TXT file.
What is the difference between UUID and GUID?
| Feature | UUID | GUID |
|---|---|---|
| Full name | Universally Unique Identifier | Globally Unique Identifier |
| Size | 128 bits | 128 bits |
| Usage | Platform-independent systems | Microsoft and .NET ecosystem |
| Format | 8-4-4-4-12 | 8-4-4-4-12 |
Where are UUIDs used?
Database records
Can be used as a primary key or a general record identifier.
REST API resources
Enables the unique identification of API resources.
Microservices
Allows a shared identifier to be carried between services.
File naming
Helps prevent file name collisions.
Transaction tracking
Correlates log, error and request records.
Distributed systems
Enables identifiers to be created without a central counter.
UUID usage examples
C#
Guid id = Guid.NewGuid();JavaScript
const id = crypto.randomUUID();Python
import uuid
id = uuid.uuid4()Java
UUID id = UUID.randomUUID();SQL Server
SELECT NEWID();PostgreSQL
SELECT gen_random_uuid();Frequently Asked Questions About the UUID & GUID Generator
What is a UUID?
What is a GUID?
Are UUID and GUID the same thing?
What is UUID v4?
How many characters is a UUID?
Is a UUID unique?
Can a UUID be written in uppercase or lowercase?
Can a UUID without hyphens be used?
Can a UUID be used as a primary key?
Is a UUID secure?
Are UUID values sent to the server?
Is the UUID & GUID Generator free?
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