UUID Generator

Generate UUID v4 identifiers instantly in your browser

Free, private, and secure - no data sent to servers

No UUIDs Generated Yet

Click the generate button above to create unique UUIDs

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to identify information in computer systems. The standard format is a 36-character string consisting of 32 hexadecimal digits separated by hyphens, displayed in five groups (8-4-4-4-12). For example: 550e8400-e29b-41d4-a716-446655440000. UUIDs are designed to be unique across both space and time without requiring a central coordinating authority.

How to Use UUID Generator

1

Select quantity

Choose how many UUIDs you want to generate from the options: 1, 5, 10, 25, 50, or 100.

2

Choose case format

Toggle between lowercase (default) and uppercase format for your UUIDs.

3

Generate UUIDs

Click the generate button to create cryptographically secure UUID v4 identifiers.

4

Copy and use

Copy individual UUIDs or all at once. Use them in your databases, APIs, or applications.

Why Use Our UUID Generator?

Cryptographically secure

Uses the native crypto.randomUUID() API to generate truly random UUIDs suitable for security-sensitive applications.

Bulk generation

Generate up to 100 UUIDs at once, perfect for database seeding, testing, or batch operations.

Complete privacy

All generation happens locally in your browser. No data is ever sent to any server.

Instant copy

One-click copy for individual UUIDs or copy all at once with newline separation.

Case flexibility

Toggle between uppercase and lowercase format to match your system requirements.

Frequently Asked Questions

A UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. UUIDs are designed to be unique across both space and time, making them ideal for database keys, session identifiers, and distributed systems.
UUID v4 is a randomly generated UUID. It uses 122 random bits out of 128, with 6 bits reserved for version and variant information. This provides approximately 5.3 x 10^36 possible unique combinations, making collisions extremely unlikely.
While UUIDs are not guaranteed to be absolutely unique, the probability of generating a duplicate UUID v4 is astronomically low. With 122 random bits, you would need to generate over 2 billion UUIDs per second for about 85 years to have a 50% chance of a collision.
Yes! The UUIDs generated by this tool use the browser's native crypto.randomUUID() API, which generates cryptographically secure random numbers. They follow the RFC 4122 standard and are suitable for production use in databases, APIs, and distributed systems.

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