What is this tool?
A UUID is a unique identifier commonly used in software systems. The ChlatWork UUID Generator creates random v4 UUIDs and lets you copy one or many at once.
Developers use UUIDs for database records, test fixtures, request IDs, public identifiers, and sample data where a normal incrementing number is not ideal.
Why use this tool?
- It quickly generates valid v4 UUID values.
- It supports bulk output when you need more than one ID.
- It is useful for database seeding, API testing, and mock data.
- It avoids reusing the same fake ID in multiple tests.
- It gives copy-ready output for request files and scripts.
How to use it
- 1
Open the UUID Generator.
- 2
Choose how many UUIDs you want.
- 3
Click Generate.
- 4
Review the generated UUID list.
- 5
Copy one value or copy the full list.
- 6
Paste the UUID into your database seed, test payload, fixture, or local note.
Common use cases
- A backend developer creates IDs for local database seed records.
- A QA tester prepares unique values for repeated API tests.
- A frontend developer mocks records before the backend endpoint is ready.
- A DevOps engineer generates correlation IDs for manual log testing.
- A student learns what UUIDs look like in real applications.
Tips and best practices
- Use UUIDs when records need unique IDs across systems.
- Do not use random UUIDs as passwords or secrets.
- Keep generated test UUIDs separate from production data.
- Use database-native UUID generation when available in production.
- Generate fresh IDs when repeating tests that require uniqueness.
FAQ
What is a v4 UUID?
A v4 UUID is a randomly generated identifier with a standard format such as xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.
Are UUIDs guaranteed unique?
Random UUID collisions are extremely unlikely, but no random system can promise absolute uniqueness without checks.
Can I generate many UUIDs at once?
Yes. Choose the quantity and generate a bulk list.
Can I use UUIDs as secure tokens?
Do not treat normal UUIDs as secure secrets. Use a proper cryptographic token for security-sensitive flows.
Is the UUID Generator free?
Yes. It is free to use on ChlatWork.