Choose quantity
Generate one UUID or create a batch of up to 100 unique identifiers at once.
FREE ONLINE UUID GENERATOR
UUID Generator
Generate unique UUIDs instantly for applications, databases, APIs, software development and testing. Create single or multiple UUIDs with one click.
01 UUID settings
UUID v4 Randomly generated UUID
✓
5
1 100
02 Output format
Lowercase Display UUID characters in lowercase.
Include hyphens Keep the standard UUID hyphen format.
Include braces Wrap each UUID with curly braces.
03 Quick presets
04 Export
Generate a UUID to get started.
VERSION v4
GENERATED 0
FORMAT Standard
HOW IT WORKS
Generate unique IDs instantly.
Create cryptographically strong random UUID v4 identifiers directly in your browser without an external API.
Customize format
Choose lowercase output, standard hyphens and optional curly braces depending on your project.
Copy and use
Copy individual UUIDs or the entire generated list and use them directly in your application.
BUILT FOR DEVELOPERS
UUIDs for every workflow.
Database records
Use UUIDs as unique identifiers for database records, entities and application objects.
API development
Generate identifiers for API resources, requests, objects and development testing.
Software development
Quickly create unique identifiers for applications and development environments.
Testing
Generate batches of UUIDs for test data, automated tests and application prototypes.
Distributed systems
UUIDs can help identify objects across distributed applications without relying on a central numbering system.
Mock data
Create realistic unique identifiers when preparing sample or development data.
UUID GUIDE
Everything you need to know about UUIDs.
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit identifier commonly used in software applications to uniquely identify objects, records, resources and other entities.
A UUID is typically represented as a sequence of hexadecimal characters separated by hyphens.
What is UUID v4?
UUID version 4 is a randomly generated UUID format. It uses random or pseudo-random data to create the identifier while reserving specific bits for the UUID version and variant.
UUID v4 is one of the most commonly used UUID versions for generating identifiers in modern applications.
What does a UUID look like?
A standard UUID is commonly represented in the form of 32 hexadecimal characters divided into five groups using hyphens.
A typical UUID has the structure: 8-4-4-4-12 hexadecimal characters.
What are UUIDs used for?
UUIDs are widely used for database identifiers, API resources, distributed systems, software applications, test data and object identifiers.
They are particularly useful when identifiers need to be generated independently across different systems or devices.
Are UUIDs unique?
UUIDs are designed so that the probability of accidentally generating the same identifier is extremely small when generated according to the relevant UUID rules.
They should therefore be treated as practically unique for many application-level use cases, while not being mathematically guaranteed to never collide.
Can I generate UUIDs without an API?
Yes. This UUID generator creates UUID v4 values directly in your browser using the browser's built-in cryptographically secure random number facilities when available.
No UUID generation API or server request is required for normal use.
FREQUENTLY ASKED QUESTIONS
UUID Generator FAQs.
What is a UUID generator? +
A UUID generator creates unique-looking 128-bit identifiers that can be used by software applications, databases, APIs and development tools.
Which UUID version does this generator use? +
This generator creates UUID version 4 identifiers, which are based primarily on randomly generated data.
How many UUIDs can I generate? +
You can generate between 1 and 100 UUIDs in a single batch.
Can I copy an individual UUID? +
Yes. Each generated UUID has its own copy button, allowing you to copy a single identifier without copying the entire list.
Can I download generated UUIDs? +
Yes. Use the TXT button to download all generated UUIDs as a plain text file.
Are generated UUIDs stored anywhere? +
The generator operates in the browser and does not require an external UUID-generation API for normal operation.