Generate secure, random UUIDs (v4) instantly. Perfect for databases, software testing, and unique keys. Supports bulk generation and formatting.
Customize your IDs
Choose how many unique IDs you need. The tool can generate up to 1000 at once.
Toggle hyphens, select uppercase letters, or wrap IDs in braces to match your code style.
Click Generate, then easily Copy the list to your clipboard or Download as a text file.
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to identify information in computer systems. The probability of generating two identical UUIDs is so infinitesimally small that for all practical purposes, they are unique.
There are several versions of UUIDs, but Version 4 is the most popular. It is generated using random numbers. Unlike Version 1 (which uses MAC addresses and timestamps), Version 4 does not reveal any information about the computer that generated it, offering better privacy.
A standard UUID is represented as 32 hexadecimal digits, displayed in five groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters (32 alphanumeric characters and 4 hyphens).
Where '4' indicates version 4, and 'y' is one of 8, 9, A, or B.
Developers use UUIDs for database primary keys and unique identifiers in API responses.
QA engineers generate bulk unique strings to populate test databases and stress test systems.
Admins assign unique Session IDs or correlation IDs to trace requests across distributed servers.
Data scientists use anonymous UUIDs to replace sensitive personal information in datasets.
Essential for Modern Applications.
In distributed systems (like microservices), generating auto-incrementing IDs is difficult. UUIDs allow each service to generate unique keys independently without coordinating with a central database.
Safe for merging databases.
Theoretically yes, but practically no. The number of possible UUIDs is 2^122. You would need to generate 1 billion UUIDs per second for about 85 years to have a 50% probability of a single collision.
Yes. The generation logic runs entirely in your browser using JavaScript. No data is sent to any server, making it fast and secure.
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