UUID Generator
Generate UUIDs (v1, v4) with bulk generation support
Generation options
Generate multiple UUIDv4 values at once. For example, create 10 IDs for seed data. This can fail if count exceeds limits—keep it between the allowed range.
Count
Generated UUIDs
Click "Generate UUIDs" to create unique identifiers
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Try Now JWT CreatorWhat is UUID Generator?
A UUID Generator is an essential tool for developers and system architects who need to create unique identifiers for databases, applications, and distributed systems. UUIDs (Universally Unique Identifiers) are 128-bit values that provide a standardized way to generate identifiers that are unique across different systems, networks, and time periods without requiring central coordination. Our online UUID Generator creates RFC 4122 compliant UUIDs using cryptographically secure random number generation, ensuring the highest quality unique identifiers. The tool supports both UUID v4 (random) generation for maximum security and privacy, as well as bulk generation capabilities for scenarios requiring multiple identifiers. Whether you're designing database schemas, building APIs, creating session management systems, or developing distributed applications, this generator provides reliable, industry-standard unique identifiers that eliminate the risk of collisions and ensure data integrity across your systems.
When to Use UUID Generator
Use our UUID Generator whenever you need unique identifiers for your applications, databases, or systems. This tool is particularly valuable when designing database schemas where you need primary keys that don't reveal information about your data volume or creation patterns. Developers commonly use it when building APIs that require unique request tracking, creating session identifiers for web applications, or generating unique file names for uploads and storage systems. It's essential for microservices architectures where different services need to generate identifiers independently without coordination. The generator is also perfect for testing scenarios where you need realistic unique identifiers, database seeding operations, or when migrating from auto-increment IDs to UUID-based systems. Use it whenever you want to avoid the complexity of coordinating unique identifier generation across multiple systems or when you need identifiers that remain unique even when merging data from different sources.
How to Use UUID Generator
7 stepsSelect the UUID version you want to generate (v4 recommended for most use cases)
Choose the quantity of UUIDs needed (single or bulk generation)
Click generate to create cryptographically secure unique identifiers
Review the generated UUIDs in the standard 8-4-4-4-12 format
Copy individual UUIDs or the entire list to your clipboard
Use the validation feature to verify existing UUIDs if needed
Integrate the UUIDs into your database, application, or system as required
Privacy & Security
100% SecureAll UUID generation occurs entirely within your web browser using client-side JavaScript and cryptographically secure random number generation. No UUIDs are ever transmitted to our servers, stored in databases, or logged anywhere outside your device. This ensures complete privacy and security for your unique identifiers, whether they're used for sensitive applications, proprietary systems, or confidential data management. The tool works offline once loaded, providing an additional layer of security for UUID generation in secure environments.
Pro Tips
7 tipsUse UUID v4 for most applications as it provides better privacy and security than v1
Store UUIDs as binary data in databases when possible to save space and improve performance
Consider using UUIDs as primary keys to avoid revealing information about your data volume
Generate UUIDs in bulk when seeding databases or creating test data to improve efficiency
Use the validation feature to ensure UUIDs from external sources are properly formatted
Keep generated UUIDs secure and don't expose them unnecessarily in URLs or logs
Consider the trade-offs between UUIDs and auto-increment IDs based on your specific use case
Frequently Asked Questions
5 Q&AQ1:What is a UUID and when should I use one?
A UUID (Universally Unique Identifier) is a 128-bit identifier that's practically guaranteed to be unique across all systems and time. Use UUIDs for database primary keys, session identifiers, file names, API request tracking, or any situation where you need a unique identifier without central coordination.
Q2:What's the difference between UUID v1 and UUID v4?
UUID v1 includes timestamp and MAC address information, making it predictable but sortable by time. UUID v4 is completely random and more secure since it doesn't reveal system information. We recommend UUID v4 for most applications due to its privacy and security benefits.
Q3:Are UUIDs really unique? Can there be duplicates?
While theoretically possible, UUID collisions are astronomically unlikely. UUID v4 has 2^122 possible values (after removing version and variant bits). The probability of generating a duplicate is so small it's considered negligible for practical purposes.
Q4:Can I generate multiple UUIDs at once for bulk operations?
Yes, our generator supports bulk UUID generation. You can specify how many UUIDs you need, and the tool will generate them all at once. This is perfect for database seeding, testing, or any scenario where you need multiple unique identifiers.
Q5:How do I validate if a string is a valid UUID?
Our tool includes UUID validation functionality. Simply paste any string into the validator, and it will check if it follows the proper UUID format (8-4-4-4-12 hexadecimal digits) and confirm whether it's a valid UUID.
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