UUID Generator

Generate cryptographically secure Universally Unique Identifiers instantly. Perfect for databases, APIs, and distributed systems.

Version 4550e8400-e29b-41d4-a716-446655440000
Version 16ba7b810-9dad-11d1-80b4-00c04fd430c8
UppercaseA987FBC9-4BED-3078-CF07-9141BA07C9F3

The Bottom Line

This UUID generator creates cryptographically secure Universally Unique Identifiers in three versions: Version 4 (random UUIDs using browser crypto API for true randomness), Version 1 (timestamp-based with simulated MAC address for sortable identifiers), and Nil UUID (all zeros: 00000000-0000-0000-0000-000000000000). Choose from five output formats including standard hyphenated (550e8400-e29b-41d4-a716-446655440000), no hyphens (550e8400e29b41d4a716446655440000), uppercase (550E8400-E29B-41D4-A716-446655440000), braces ({550e8400-e29b-41d4-a716-446655440000}), and URN format (urn:uuid:550e8400-e29b-41d4-a716-446655440000). Bulk generation supports creating up to 100 UUIDs simultaneously with identical settings for database seeding, API key generation, or batch operations. One-click copy functionality for individual UUIDs or copy all generated UUIDs at once. History tracking displays all recently generated UUIDs with individual copy buttons for quick retrieval. Perfect for database primary keys in distributed systems, API authentication tokens, session identifiers, file naming for cloud storage, message queue correlation IDs, microservice request tracking, cache keys, webhook signatures, temporary resource identifiers, or any scenario requiring globally unique identifiers without central coordination. Version 4 UUIDs provide 122 bits of randomness ensuring virtually zero collision probability even across billions of identifiers. All UUID generation uses browser-native Web Crypto API for cryptographic-quality randomness—the same security-grade random number generation used for HTTPS encryption. Completely client-side generation means no UUIDs ever get transmitted to servers, ensuring absolute privacy for database identifiers, API keys, or internal system tokens.

Generated UUID

80701ca2-a6ee-4e6e-abab-7c07bde64c6e
Version:v4
Format:standard
Length:36 characters

UUID Options

UUID Version

Output Format

Generate Multiple UUIDs

5
5 UUIDs

Recently Generated (2)

80701ca2-a6ee-4e6e-abab-7c07bde64c6e
60c254ab-f98b-4138-83da-855990618477

About UUIDs

Universally Unique

UUIDs are 128-bit identifiers designed to be unique across all space and time without coordination.

Version 1 (Time-based)

Generated using timestamp and MAC address. Useful when you need sortable identifiers.

Version 4 (Random)

Most commonly used. Generated using cryptographically secure random numbers.

Standard Format

8-4-4-4-12 hexadecimal digits separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000).

Database Keys

Commonly used as primary keys in distributed databases to avoid collisions.

Generated Locally

All UUIDs are generated in your browser using cryptographically secure random values.

Problems This UUID Generator Solves

  • Eliminates UUID collision risks from weak generators - Stop using timestamp-only or pseudo-random UUIDs that might collide across distributed systems. Generate cryptographically secure UUIDs with 122 bits of randomness ensuring virtually zero collision probability.
  • Prevents manual UUID formatting errors - Forget copying UUIDs incorrectly, missing hyphens, or using wrong case. Select output format (hyphenated, no hyphens, uppercase, braces, URN) and generate perfectly formatted identifiers every time.
  • Removes database primary key coordination overhead - Avoid complex distributed ID generation systems or centralized ID servers. Generate unique primary keys client-side for distributed databases without network round-trips or coordination.
  • Saves time on bulk UUID creation - Stop manually generating UUIDs one-by-one when seeding databases or creating test data. Generate up to 100 UUIDs instantly with identical format settings for batch operations.
  • Eliminates API key generation complexity - Forget writing custom code to generate secure API keys or authentication tokens. Create cryptographically random UUIDs suitable for API authentication, session tokens, or webhook signatures.
  • Prevents UUID history loss during development - Avoid losing generated UUIDs before saving them to configuration files or code. History tracking preserves recently generated UUIDs with one-click copy for easy retrieval.
  • Streamlines microservice correlation ID generation - Stop creating custom request tracking systems or using less-secure identifiers. Generate Version 4 UUIDs for distributed tracing, request correlation, or transaction IDs across microservices.
  • Removes sortable identifier confusion - Forget wondering whether you need time-ordered UUIDs for database indexes. Version 1 UUIDs include timestamps for sequential ordering while maintaining global uniqueness.
  • Eliminates format conversion manual work - Avoid manually adding/removing hyphens, changing case, or wrapping UUIDs in braces for different systems. Switch output formats instantly without reformatting existing UUIDs.
  • Ensures complete privacy for system identifiers - Stop using UUID generators that might log database keys, API tokens, or session identifiers. All generation happens locally in your browser without transmitting UUIDs to servers.