Generate cryptographically secure UUIDs, random IDs, passwords and cryptographic keys. Perfect for developers, security professionals, and system administrators.
Our online UUID generator creates RFC 4122 compliant identifiers with no registration required. Works in any modern browser with complete privacy.
Generate secure, unique identifiers for any use case
UUIDs (Universally Unique Identifiers) are 128-bit values used to uniquely identify data across systems. They are designed to avoid collisions without central coordination.
Recommendation: Use UUID v4 for general purposes, and UUID v7 when you want time-ordered identifiers that sort well in databases.
Select the 'UUID' tab from the four available options (UUID, Random ID, Password, Crypto Keys)
Choose your preferences such as UUID version (v4 is recommended for most uses) and quantity
Click 'Generate' to create your unique identifiers instantly
Copy the generated UUIDs to clipboard with one click and use them in your projects
Repeat as needed - all processing happens locally in your browser for privacy
Generate UUIDs for database records to ensure global uniqueness across distributed systems without coordination
Create unique API keys and authentication tokens for securing your web services and applications
Generate secure session identifiers for user authentication and tracking without collisions
Create unique identifiers for media files, user uploads, and digital assets in content management systems
Generate UUIDs for database primary keys, session IDs, and unique identifiers without coordination between systems
Create strong passwords, API keys, and cryptographic tokens for secure systems and user access
Generate unique identifiers for logging, monitoring, and resource management across distributed systems
Create unique identifiers for containers, services, and deployment tracking in cloud environments
UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122 that guarantees global uniqueness without central coordination.
UUID version 4 (v4) uses random or pseudo-random numbers, making it the most common version for general use due to its simplicity and security.
With 128 bits of entropy, the probability of generating two identical UUIDs is astronomically low, making them ideal for distributed systems.
Cryptographically secure random number generators (CSPRNG) provide the high entropy and unpredictability required for security-sensitive applications.
Different UUID versions exist: v4 uses random numbers (most common), v1 uses timestamps, and v5 uses namespaces for specific use cases.
Using predictable IDs for security
Always use cryptographically secure generators for IDs used in security contexts, not sequential or predictable patterns
Wrong UUID version for use case
Use UUID v4 for general purposes, v1 for time-based sorting, or v5 for namespace consistency
Not understanding UUID format
UUIDs follow the format 8-4-4-4-12 hexadecimal characters separated by hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000)
Reusing identifiers across contexts
Generate fresh IDs for each use case and avoid reusing identifiers across different systems
UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122. Use UUIDs when you need globally unique identifiers for database records, distributed systems, or when you want to avoid ID collisions across different systems.
Yes, our UUID generator is completely free to use with no hidden costs, registration required, or limitations on the number of UUIDs you can generate.
Yes, our UUID generator uses cryptographically secure random number generators (CSPRNG) provided by modern browsers, ensuring high entropy and unpredictability.
Absolutely. All UUID generation happens locally in your browser with no data sent to any server. Your privacy is protected by design.
UUID v4 uses random or pseudo-random numbers, making it the most common version for general use. Other versions like v1 (time-based) or v5 (namespace-based) are more specialized.
Absolutely! UUIDs make excellent primary keys, especially in distributed systems or when you need to generate IDs on the client side without coordination with a central authority.