Generate unique identifiers
Generate UUIDs, short IDs, and nano IDs
How to Generate Unique UUIDs
Create universally unique identifiers for databases, APIs, and distributed systems. Generate UUID v1, v4, or compact formats instantly.
Select UUID Version
Choose UUID v4 (random) for most use cases, v1 (timestamp-based) for sortable IDs, or Nano ID for compact strings.
Set Generation Options
Configure case (uppercase/lowercase), hyphens, and batch quantity. Generate 1 to 100 UUIDs at once.
Copy Your UUIDs
Click any UUID to copy, or use 'Copy All' for bulk export. UUIDs are cryptographically random.
Why Use DevSensei?
What makes DevSensei different from other tools
Multiple Formats
Generate UUID v1, v4, Short IDs, and Nano IDs. Each format optimized for different use cases.
Cryptographic Randomness
Uses Web Crypto API for true randomness. Your UUIDs are unpredictable and collision-resistant.
Bulk Generation
Generate up to 100 unique IDs in one click. Perfect for seeding databases or creating test data.
Frequently Asked Questions
Common questions about this tool
UUID v4 uses random numbers and is best for general use. UUID v1 includes a timestamp component, making it sortable chronologically - useful for database primary keys where ordering matters.
Theoretically yes, but practically no. A UUID v4 has 122 random bits, making collision probability 1 in 2.71 quintillion. You'd need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of one collision.