generate v4 UUIDs instantly. single or bulk mode — up to 100 at once. cryptographically secure.
UUID Generator creates version 4 universally unique identifiers using a cryptographically secure random number generator. Generate a single UUID or bulk-generate up to 100 at once for database seeding, testing, and development.
Every UUID follows the standard format: 8-4-4-4-12 hexadecimal characters (e.g., 550e8400-e29b-41d4-a716-446655440000). Version 4 UUIDs are randomly generated and are virtually guaranteed to be unique.
The generator uses the Web Crypto API for true randomness. No data is sent to any server.
Click Generate
Click the generate button to create a new UUID instantly.
Choose bulk mode
Switch to bulk mode to generate up to 100 UUIDs at once.
Copy
Click to copy a single UUID or copy all UUIDs in bulk mode.
Database primary keys
Generate UUIDs for use as primary keys in databases.
API testing
Create unique identifiers for test requests and mock data.
Session tokens
Generate unique session identifiers for development and testing.
File naming
Create unique filenames to prevent collisions in storage systems.
Distributed systems
Generate IDs that are unique across multiple servers without coordination.
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