Useful for
- Generate test IDs for APIs, databases, fixtures, and documentation examples.
- Create identifiers without relying on a central auto-increment counter.
- Use disposable IDs in prototypes, local development, and sample payloads.
UUID Generator
Generate random UUID v4 identifiers in your browser.
Tool guide
How to use UUID Generator
UUID Generator gives you a focused way to handle one small task quickly. Generate random UUID v4 identifiers in your browser. It is free to use, requires no login, and is built for quick checks when you need a practical result.
Example
For example, generate a UUID v4 for a test customer record, then paste it into a JSON payload or database seed file.
Good to know
Most developer utilities run in your browser. Avoid pasting secrets, API keys, passwords, or private production data into any online tool.
How it works
The UUID generator creates random version 4 UUIDs in the browser. UUIDs are designed to be unique identifiers, not passwords or secret tokens.
UUID v4 uses random bits formatted as 8-4-4-4-12 hexadecimal characters.
Practical examples
- Generate IDs for mock API records.
- Create stable-looking IDs for documentation samples.
- Use a UUID in a local prototype before the real database exists.
Common mistakes
- Do not use UUIDs as access tokens by themselves.
- Do not assume a UUID reveals creation time unless you are using a time-based UUID version.
Questions
Are UUID and GUID the same?
In everyday developer usage, they usually refer to the same kind of 128-bit identifier.
Are UUIDs secret?
No. They are identifiers, not credentials.