UUID Generator
Free online UUID generator. Generate UUID v4, v1, GUID, and custom UUIDs. Perfect for developers, database designers, and anyone who needs unique identifiers.
UUID Generator
UUID Validator
Features
How to Use UUID Generator
Step-by-Step Guide
- 1Choose the UUID version (v4, v1, v3, v5)
- 2Select the number of UUIDs to generate
- 3Choose output format (standard, uppercase, lowercase)
- 4Click generate and copy the UUIDs
UUID Versions
Common Use Cases for UUID Generator
Database Design
Generate primary keys and unique identifiers for database tables.
API Development
Create unique resource identifiers for REST APIs and microservices.
System Configuration
Generate unique IDs for system components and configurations.
Testing & QA
Create test data with unique identifiers for automated testing.
Mobile Development
Generate device IDs and session tokens for mobile applications.
Security & Authentication
Create secure tokens and session identifiers for authentication.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. It's commonly used in software development to generate unique identifiers for resources, objects, and data.
What's the difference between UUID v4 and v1?
UUID v4 is randomly generated and provides the highest level of uniqueness. UUID v1 is time-based and includes the MAC address, making it deterministic but potentially less secure.
Are UUIDs really unique?
While technically possible, the probability of generating duplicate UUIDs is extremely low. UUID v4 has 2^122 possible combinations, making collisions virtually impossible in practice.
What's the difference between UUID and GUID?
GUID (Globally Unique Identifier) is Microsoft's implementation of UUID. They follow the same standard but may have slight formatting differences in some contexts.
Can I validate existing UUIDs?
Yes! Our UUID generator includes a validation feature that can check if a given string is a valid UUID format and determine its version.
How many UUIDs can I generate at once?
You can generate up to 1000 UUIDs at once for bulk operations. This is useful for testing, data migration, or batch processing scenarios.
Why Choose Our UUID Generator?
Multiple UUID Versions
Support for v1, v3, v4, v5, and GUID formats.
Bulk Generation
Generate up to 1000 UUIDs at once.
UUID Validation
Validate existing UUIDs and check their format.
100% Free
No registration, no hidden costs.
Privacy First
All processing happens locally.
Mobile Friendly
Works perfectly on all devices.