UUID Generator
Generate UUID/GUID in multiple versions and formats
550e8400-e29b-41d4-a716-446655440000
Generated UUIDs (1)
Bulk Generation
About UUIDs
What is UUID?
UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems.
- • 128-bit identifier
- • Globally unique
- • No central authority needed
- • Multiple versions available
Common Use Cases
- • Database primary keys
- • Session identifiers
- • File naming
- • API request tracking
- • Distributed systems
- • Transaction IDs
Version Differences
UUID v1
Based on timestamp and MAC address. Provides uniqueness but may reveal information about the generating system.
UUID v4
Randomly generated. Most commonly used version. Provides excellent uniqueness with no information leakage.
Online UUID / GUID Generator
Generate random UUIDs (Universally Unique Identifiers) instantly with our free tool. Whether you need a standard v4 UUID or a time-based v1 UUID, we support multiple versions and formats. UUIDs (also known as GUIDs) are essential for developers creating unique keys for database records, user sessions, or distributed systems. Our generator runs locally in your browser, ensuring your unique IDs are generated privately and securely.
Features
- Generate UUID v1 (timestamp-based) and v4 (random)
- Bulk generation support (up to 100 at once)
- Custom formatting (Hyphens, Uppercase, Braces)
- One-click copy and bulk download
- Cryptographically secure random number generation
How to Use
- 1Select the UUID version (v4 is recommended for most use cases).
- 2Choose your desired output format (e.g., Default, Uppercase).
- 3Set the quantity of UUIDs to generate.
- 4Click "Generate" and then copy or download your list.