How the UUID v4 generator works
Generate a single UUID v4 or create a list of multiple identifiers. Each result follows the standard UUID format and can be copied for use in development, databases, APIs, tests or internal tools.
Local browser generation
Free UUID v4 Generator
Generate random UUID v4 identifiers for projects, APIs, databases, tests and internal tools.
Create a single UUID or generate a list of multiple identifiers and copy them all at once.
Free developer tool
UUID v4 Generator
Generate random UUID v4 identifiers for APIs, databases, tests, internal tools and software projects.
UUID generator
Generate UUID v4 identifiers
Create secure random UUID v4 identifiers for development, databases, APIs, tests and internal tools.
Generated UUID
Minimum: 1Maximum: 100
Generated UUIDs
Choose a quantity and generate a UUID list.
Choose a quantity and generate a UUID list.
What you can use UUID v4 identifiers for
- Create identifiers for database records.
- Assign IDs to API resources and backend entities.
- Generate unique values for tests and mock data.
- Create identifiers for internal tools and admin panels.
- Reduce dependence on sequential numeric IDs.
- Share identifiers across distributed systems.
Tips when working with UUIDs
- Store UUIDs as native UUID values when your database supports them.
- Use a consistent lowercase or uppercase format across your project.
- Validate UUID input before storing or processing it.
- Do not use UUIDs as passwords, API keys or secret tokens.
- Generate identifiers on the backend when persistence or authorization matters.
- Add database indexes when UUID fields are frequently searched.
FAQ
Frequently asked questions
Is the UUID generator free?
Yes. You can generate individual UUID v4 identifiers and lists for free without creating an account.
What UUID version does the tool generate?
The tool generates UUID version 4 identifiers, which use random values while preserving the version and variant bits defined by the UUID format.
Can I use these UUIDs in databases?
Yes. UUIDs are commonly used as primary keys or public identifiers in databases and software systems.
Can I generate several UUIDs at once?
Yes. The tool can generate a list of multiple UUIDs and copy all of them together.
Are UUIDs guaranteed to never repeat?
No finite random identifier system can provide an absolute mathematical guarantee. UUID v4 offers an extremely large identifier space, making accidental collisions extraordinarily unlikely when generated correctly.
Can I use a UUID as a password or token?
No. UUIDs are designed as identifiers, not as authentication secrets, passwords or API keys.
A UUID is not a password
UUIDs are identifiers and should not be used as passwords, API keys, access tokens or security secrets.
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