UUID Generator Online

How to Use

1. 1

   Set the count (optional)

   Enter how many UUIDs you need — from 1 to 100. The default is 1.

2. 2

   Click Generate

   Click the Generate button to create cryptographically secure UUIDs instantly.

3. 3

   Copy your UUID(s)

   Click Copy next to any individual UUID, or use the Copy All button to copy all generated UUIDs at once.

Features

• Generates UUID version 4 (random) per RFC 4122
• Uses crypto.randomUUID() — cryptographically secure
• Bulk generation: up to 100 UUIDs at once
• One-click copy per UUID or copy all
• Works entirely in your browser
• No data sent to any server
• Free with no limits or sign-up
• Instant generation with zero latency

Frequently Asked Questions

QWhat is a UUID?

UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify objects in computer systems. The standard format is 8-4-4-4-12 hexadecimal characters separated by hyphens.

QWhat is UUID v4?

UUID version 4 is randomly generated. It uses random or pseudo-random numbers for all 128 bits (with 4 bits for the version and 2 bits for the variant). It is the most commonly used UUID version.

QAre these UUIDs truly unique?

UUID v4 has 122 bits of randomness, resulting in 5.3 × 10^36 possible values. The probability of a collision is astronomically small — effectively zero for any practical use.

QIs it safe to use these UUIDs in production?

Yes. This tool uses the Web Crypto API (crypto.randomUUID), which is the same cryptographically secure source used by modern browsers and servers.

QWhat are common use cases for UUIDs?

UUIDs are used as primary keys in databases, session identifiers, correlation IDs for distributed tracing, file names, API keys, and anywhere a unique identifier is needed without a central registry.

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