UUID Generator
Generate random UUIDs (v4) online. Free bulk UUID generation tool.
How to use: Click Generate to create UUIDs. Adjust quantity and version, then copy.
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9af3c0cf-262e-4eea-915f-8243bc1937c5How to Generate UUIDs Online
Click the Generate button to create a new UUID v4. Generate multiple UUIDs at once by specifying a quantity. Each UUID is generated using the Web Crypto API for cryptographic randomness. Copy individual UUIDs or all generated UUIDs with one click.
UUID Formats and Versions
UUID v4 is the most commonly used version, generated from random numbers. The format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where 4 indicates version 4 and y is one of 8, 9, a, or b. UUIDs are used as database primary keys, API identifiers, session tokens, and file names.
Frequently Asked Questions
- What is a UUID?
- A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify resources. Version 4 UUIDs are randomly generated and have a near-zero chance of collision, making them ideal for distributed systems.
- How many UUIDs can I generate at once?
- You can generate up to hundreds of UUIDs in a single click. Each UUID is cryptographically random and RFC 4122 compliant. Use bulk generation for database seeding, testing, and batch operations.
- What is the difference between UUID and GUID?
- UUID and GUID are essentially the same thing. UUID is the standard term used in most programming contexts, while GUID (Globally Unique Identifier) is the term Microsoft uses. They follow the same format and specification.