What is a UUID?
A UUID, also called a GUID, is a 128-bit identifier designed to be unique across systems and time.
UUID Generator
Generate UUID v1, v4, and v7 identifiers instantly in your browser. Fast, free, and private with one-click copy or download.
How it worksGENERATED RESULT
How to generate UUIDs
- Select the UUID version that fits your use case: v1, v4, or v7.
- Choose how many identifiers to generate.
- Select Generate New UUIDs whenever you need a fresh set.
- Copy the generated UUIDs or download them as a text file.
Common UUID generator uses
Create identifiers for database records, APIs, test data, distributed systems, application sessions, and other resources that need a unique value.
UUID version guide
- v1 uses a timestamp and node information.
- v4 uses random values.
- v7 is time-ordered for sortable identifiers.
UUID Generator FAQ
Which UUID version should I use?
Use v4 when you need a random identifier, v1 when a timestamp-based UUID is required, and v7 when you want time-ordered identifiers for database-friendly sorting.
Can I generate multiple UUIDs at once?
Yes. Choose a quantity from the menu to generate up to 100 UUIDs, then copy or download the result.
Are generated UUIDs sent to a server?
No. UUIDs are generated locally in your browser and are not uploaded or stored by DevKit.
Is UUID the same as GUID?
In most developer contexts, GUID and UUID refer to the same 128-bit identifier format. GUID is a common Microsoft term for UUID.
Are UUID v4 values random?
Yes. UUID v4 is generated from random values and is a good general-purpose choice when you do not need time ordering.
Why use UUID v7?
UUID v7 includes a time-ordered component, which can make newly generated identifiers sort more naturally in databases and logs.
Can two UUIDs collide?
The probability is extremely small when UUIDs are generated correctly. Applications should still enforce uniqueness where it is a data requirement.
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