UUID / GUID Generator
Instantly generate random, secure UUIDs (version 4) for your database records, API keys, or distributed systems. Generate up to 50 at a time.
Generated UUIDs (v4)
5- b9230607-3fa5-4048-a256-194ce5e4eb64
- 012dafed-3272-477e-9e23-eed88860c87c
- 54e34130-e44d-4c4f-bba6-055f08f2b378
- a979df39-8353-454b-8f76-f3b8d23b417b
- 5aac6902-44ec-4f24-bb9d-5b6fc20fed8b
How to use this tool
- Select the number of UUIDs you want to generate (between 1 and 50).
- Click the "Generate" button to instantly create new unique identifiers.
- Click the copy icon next to any individual UUID to copy just that one.
- Click "Copy All" to copy the entire list to your clipboard.
- All UUIDs are generated locally in your browser using secure random number generation.
Why use our UUID / GUID Generator?
UUIDs (Universally Unique Identifiers) are essential for modern distributed systems, microservices, and databases. Unlike sequential integer IDs, UUIDs can be generated independently by any client or server without the risk of collision. Our generator creates Version 4 UUIDs, which are completely random and unpredictable, making them perfect for secure resource identifiers, session tokens, and database primary keys.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit label used for information in computer systems. When generated according to standard methods, UUIDs are practically unique, without depending on a central registration authority or coordination between the parties generating them.
Are UUIDs truly unique?
While the probability of generating a duplicate UUID (a collision) is not zero, it is so close to zero as to be negligible. For a UUID v4, there are 2^122 possible combinations. You would need to generate 1 billion UUIDs per second for about 85 years to reach a 50% probability of a single collision.
What is UUID v4?
UUID version 4 is a specific type of UUID that is generated using random or pseudo-random numbers. It is the most common version used in modern applications because it doesn't rely on MAC addresses or timestamps, ensuring privacy and unpredictability.
When should developers use UUID instead of auto-increment IDs?
UUIDs are ideal for distributed systems where multiple databases or services need to generate IDs independently without coordination. They are also excellent for security, as they prevent attackers from guessing the number of users or resources (which is possible with sequential IDs like 1, 2, 3).