UUID v4 Generator
Bulk-generate cryptographically secure version 4 UUIDs instantly in your browser.
What is UUID v4?
A Universally Unique Identifier (UUID) version 4 is a 128-bit value generated randomly. It contains 122 bits of entropy and 6 bits of metadata defining the version and variant.
This tool uses the browser-native window.crypto.randomUUID() algorithm, which draws entropy directly from the OS-level Cryptographically Secure Pseudorandom Number Generator (CSPRNG). The probability of a duplicate is virtually zero, making them perfect for transaction IDs, primary keys, session tokens, and database indices.
What is the UUID v4 Generator?
The UUID v4 Generator creates bulk Universally Unique Identifiers (UUIDs) locally in your browser. These are widely used in database indices, API transactions, and session keys.
How it Works
It utilizes the browser's native window.crypto.randomUUID API, drawing entropy from OS-level random sources to construct unique identifiers.
Benefits of local generation
- Bulk generation up to 500 UUIDs.
- Custom options for hyphens and braces.
- Zero registration or database tracking.
Security Information
We use standard browser APIs to generate UUIDs locally, ensuring there is no network tracking.
Best Practices
- Use UUID v4 for unique primary keys in distributed databases.
- Include hyphens for standard RFC compliance.
- Do not use UUIDs as security tokens unless verified by server validation.