UUID Generator
Generate universally unique identifiers (UUIDs).
Click "Generate New UUID" to get a Version 4 UUID.
How to Use the UUID Generator:
- 1 Click the "Generate New UUID" button.
- 2 A new Version 4 UUID will be displayed in the text field.
- 3 Click the copy button next to the UUID to copy it to your clipboard.
What is a UUID?
A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit number used to identify information in computer systems. The key feature of a UUID is that it is "universally unique," meaning the probability of two different systems generating the same UUID is virtually zero.
This tool generates Version 4 (V4) UUIDs, which are created using random or pseudo-random numbers. This is the most common type of UUID used in software development.
Common Use Cases for UUIDs:
- Database Keys: Using UUIDs as primary keys in a database table helps prevent collisions, especially in distributed systems where auto-incrementing integers can be problematic.
- Transaction IDs: Assigning a unique UUID to every transaction (e.g., an API request, a user session, an error log) makes it easy to track and debug.
- Unique Filenames: Generating UUIDs for uploaded files can prevent naming conflicts.
- Activation Keys: Used in software licensing to generate unique activation codes.