Free Online UUID / GUID Generator
Generate random UUID v4 and GUID strings instantly in your browser. Use them as database primary keys, session identifiers, test data, or any scenario requiring a globally unique value. No account, no uploads.
✓ Free developer tool✓ No account required✓ Browser-based utility✓ Fast results✓ Mobile friendly
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This tool runs in your browser and does not upload your data to BuBird servers.
How To Use
How to Use UUID / GUID Generator
1
Choose the Version or Format
Select UUID v4 (random) or adjust format options if available in the tool.
2
Set the Quantity
Enter how many UUIDs you need — one for quick use or multiple for bulk generation.
3
Generate
Click Generate to produce the UUID(s). Each value is unique and randomly generated in your browser.
4
Copy Your UUIDs
Click Copy to copy a single UUID, or copy all bulk-generated values at once for use in your code, database, or test data.
Example
Example Use
Seeding a Database with Test Records
You need 20 unique primary keys to seed a local development database. Generate 20 UUIDs in bulk, copy the list, and paste them directly into your SQL INSERT statements or seed file. Each UUID is guaranteed to be unique, avoiding primary key conflicts in your test schema.
Use Cases
Who Uses UUID / GUID Generator
Backend Developers
Generate primary keys for database records when using UUID-based ID strategies instead of auto-increment integers.
QA Engineers
Create unique identifiers for test records, test users, and test session tokens during automated test setup.
DevOps Engineers
Generate unique deployment IDs, trace IDs, and correlation IDs for distributed system logging and monitoring.
API Designers
Create example resource IDs for API documentation, mock responses, and OpenAPI specification examples.
Full-Stack Developers
Generate client-side IDs for optimistic UI updates before a server-generated ID is returned from the API.
Students & Learners
Understand how UUIDs work and use them in database schema exercises and programming projects.
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FAQ
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information. UUID v4 values are randomly generated and formatted as 8-4-4-4-12 hexadecimal digits, for example: 550e8400-e29b-41d4-a716-446655440000.
What is the difference between UUID and GUID?
UUID and GUID (Globally Unique Identifier) refer to the same format. GUID is the term used by Microsoft; UUID is used by the broader RFC 4122 standard. They are interchangeable in practice.
Are the UUIDs generated truly unique?
UUID v4 values are randomly generated using 122 bits of randomness. The probability of a collision is astronomically low, making them suitable as unique identifiers in virtually all practical applications.
Can I generate multiple UUIDs at once?
Yes. The tool supports bulk UUID generation. Set the quantity and click Generate to produce multiple unique values in one step.
Are the generated UUIDs sent to any server?
No. All UUIDs are generated locally in your browser. No data is sent to BuBird servers.