UUID Generator
Generate random v4 UUIDs instantly. Perfect for database keys, API tokens, and unique identifiers.
No UUIDs generated yet. Click "Generate" to start.
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit identifier used in software development to uniquely identify information without requiring centralized coordination. UUIDs are standard in databases, APIs, and distributed systems.
This tool generates UUID v4 (random) identifiers, which are created using random or pseudo-random numbers. They have a 1 in 2^122 chance of collision, making them practically unique.
Common Use Cases
🗄️ Database Primary Keys
Use UUIDs as primary keys in databases where distributed systems need unique identifiers.
🔑 API Tokens
Generate secure tokens for API authentication and session management.
📦 Distributed Systems
Create unique IDs across multiple systems without a central authority.
🔄 Entity Identification
Identify resources, objects, or entities across different contexts and systems.
Frequently Asked Questions
What does UUID stand for?
UUID stands for Universally Unique Identifier. It's a 128-bit identifier standardized by the Open Software Foundation (OSF).
What is the difference between UUID v1 and v4?
UUID v1 is time-based (uses timestamp and MAC address), while v4 is randomly generated. v4 is more common for general use because it doesn't reveal network information.
Is my data secure when using this UUID generator?
Yes! All UUID generation happens in your browser using crypto.getRandomValues(). No data is ever sent to any server. Your UUIDs are completely private.
How many UUIDs can I generate at once?
You can generate up to 100 UUIDs at once. For larger batches, generate multiple times and combine the results.
100% client-side processing. Your data never leaves your browser.