UUID / GUID Generator
Generate cryptographically secure Version 4 (v4) UUIDs and GUIDs using the browser's Web Crypto API. Batch generate single or bulk unique identifiers.
What is UUID / GUID Generator?
UUID Generator is an online utility that creates Universally Unique Identifiers (UUID Version 4) according to RFC 4122 specifications, providing 122 bits of cryptographic entropy.
How UUID / GUID Generator Works
The tool uses `crypto.randomUUID()` (or 128-bit `crypto.getRandomValues()` with RFC 4122 variant and version bit-masking) to generate random 36-character hexadecimal identifiers with near-zero collision probability.
Key Features
- ✓Cryptographically random generation powered by browser Web Crypto API
- ✓Batch generation support (1 to 100 UUIDs at once)
- ✓Optional uppercase or hyphen-free formatting
- ✓One-click copy of individual or bulk UUIDs
Common Use Cases
- •Generating primary keys for distributed databases (PostgreSQL, MongoDB, DynamoDB)
- •Assigning unique transaction tracking IDs and request IDs in microservices
- •Creating unique session identifiers and API key tokens
Examples & Sample Data
Standard RFC 4122 v4 UUID
Generate 1 UUID (lowercase with hyphens)f47ac10b-58cc-4372-a567-0e02b2c3d479Contains version 4 indicator ('4' at digit 13) and RFC 4122 variant bits ('8', '9', 'a', or 'b' at digit 17).
100% Client-Side Privacy Guarantee
UUIDs are generated entirely in local client memory via the Web Crypto API. No generated UUIDs are stored or transmitted.
How to Use UUID / GUID Generator
- 1
Select the number of UUIDs you wish to generate.
- 2
Choose formatting options (uppercase, remove hyphens).
- 3
Click 'Generate UUIDs'.
- 4
Copy single UUIDs or the entire batch with one click.