UUID / GUID Generator
Generate one UUID v4 or a batch of IDs for tests, records, and requests.
UUID v4 generator
A UUID is a long random ID. Developers use it for database rows, request IDs, uploaded files, sessions, and test data.
A normal UUID v4 looks like 123e4567-e89b-12d3-a456-426614174000. You can make one ID or many IDs at once.
UUID vs GUID
UUID and GUID usually mean the same kind of ID. GUID is the name you often see in Microsoft tools. UUID is the name you see in many other systems.
Can two UUIDs be the same?
In real projects, the chance is very small. UUID v4 is made for places where many machines need to create IDs without asking one central server first.
Works well for
- Database primary keys
- Session identifiers
- API request tracking
- File names for uploaded content
- Distributed system identifiers
How to use UUID / GUID Generator
The UUID generator creates random UUID values for tests, fixtures, database records, and sample data. It is useful when you need unique-looking IDs quickly.
Developers often use this page when they need uuid generator, uuid generator v4, guid generator, and online uuid generate.
Privacy and data handling
This generator creates values in the browser for testing, fixtures, and local development.
- Generated values are shown on the page and are not saved by the tool.
- Copy buttons use your browser clipboard permission when available.
- Review generated output before using it in production code or configuration.
Examples
Generate a UUID v4
Input
Generate 1 UUIDOutput
3f7d4b6e-3b7b-4d37-9f72-9b2c1a2f0b91The value is random-looking and suitable for test records and mock data.
Generate a list for fixtures
Input
Generate 3 UUIDsOutput
3f7d4b6e-3b7b-4d37-9f72-9b2c1a2f0b91
7b4a0e54-1f42-4e83-b34d-45a2df4c9a10
da1a2c39-f128-4c99-8e5e-6adf98f6d821Multiple UUIDs are handy when filling local database seeds.
Steps
- 1Choose how many UUIDs you need.
- 2Generate the values.
- 3Copy one UUID or the full list.
Common use cases
- Create IDs for test records.
- Fill mock API responses.
- Generate placeholder IDs for local development.
Practical tips
- UUIDs are useful for uniqueness, not for hiding information.
- Do not use UUIDs alone as authorization checks.
- Keep the same casing style across a project.
FAQ
What is a UUID?
A UUID is a 128-bit identifier usually shown as a string with hyphens. Version 4 UUIDs are randomly generated.
Can two UUIDs be the same?
It is possible in theory, but the chance is extremely small for random UUID v4 values.