UUID Generator : Cryptographically Secure UUID v4 & GUID Generator
The Calcivo UUID Generator produces RFC 4122 Version 4 Universally Unique Identifiers using browser-native Cryptographically Secure Pseudo-Random Number Generators (CSPRNG). Generate individual or bulk UUIDs with complete collision safety.
Interactive Calculator
100% Client-Side EngineStep-by-Step Examples
Generating Database Primary Key
Generating a unique decentralized identifier for distributed records.
Provides 122 bits of true entropy, guaranteeing collision uniqueness across planetary scale systems.
How to Use This Tool
- Select how many UUIDs to generate (from 1 up to 50 at once).
- Toggle formatting options: UPPERCASE, no hyphens, or wrapped braces {}.
- Click Regenerate to draw fresh cryptographic entropy.
- Copy individual UUIDs or click Copy All for batch import.
Frequently Asked Questions
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