Generate standard Version 4 Universal Unique Identifiers (UUID) instantly. Create single or bulk UUIDs for database keys, software licensing, and development.
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Configuration
Result Output
Generate Secure V4 UUIDs
When designing large-scale databases, generating unique primary keys is non-negotiable. Standard auto-incrementing integers (like 1, 2, 3) are terrible for distributed systems and expose how much data you have to competitors. UUIDs solve this.
Our UUID generator utilizes the `crypto.randomUUID()` native API available entirely in your browser. This ensures that the generated identifiers are mathematically sound, completely random, and generated securely on your own device without ever contacting our servers.
Bulk Generation and Formatting
Many development tasks require a large array of unique identifiers for seeding databases, creating mock data, or distributing API keys. Manually clicking a button hundreds of times is an awful experience.
Using our bulk generation tool, you can instantly spit out up to 500 unique UUIDs at once. You can also customize the output: strip out the standard hyphens, or convert the entire string into uppercase for systems that require strict data normalization schemas before import.
How to use this UUID / GUID Generator?
1
Select Quantity
Choose whether you need a single UUID or a bulk list (up to 500).
2
Generate
Click the generate button to instantly compute mathematically secure v4 UUIDs.
3
Copy Results
Use the copy button to transfer the strings to your clipboard.
4
Refresh
Easily regenerate a new batch of completely unique identifiers.
Frequently Asked Questions
A UUID (Universally Unique Identifier), also known as a GUID, is a 128-bit label used for identifying information in computer systems. It looks like this: 123e4567-e89b-12d3-a456-426614174000.
Version 4 UUIDs are completely randomized. Unlike previous versions that relied on MAC addresses and time stamps (which could compromise privacy), V4 generates the identifier using a cryptographic pseudo-random number generator (CSPRNG).
Mathematically, yes. Practically, no. The number of random version 4 UUIDs is 2^122 (approx. 5.3x10^36). To have a 50% chance of a single collision, you would need to generate 1 billion UUIDs per second for about 85 years.
Our UI is limited to 500 at a time to prevent browser lagging, but since it uses the native Web Crypto API, you can generate millions rapidly in programmatic environments.