UUID Generator & Validator - v1, v4 UUIDs
Generate and validate Universally Unique Identifiers (UUIDs). Supports v1 (timestamp-based) and v4 (random) with bulk generation and format conversion.
Generate UUIDs
Random UUIDs using cryptographically secure random numbers
8-4-4-4-12 format (e.g., 550e8400-e29b-41d4-a716-446655440000)
Generate 1-100 UUIDs at once
Generated UUIDs
🎲
Generated UUIDs will appear here
🔍 UUID Validator
Validate UUID format and extract version and variant information.
🎲 Multiple Versions
Generate UUID v1 (timestamp-based) or v4 (random). Both versions follow RFC 4122 specification for guaranteed uniqueness.
⚡ Bulk Generation
Generate up to 100 UUIDs at once. Perfect for database seeding, testing, or creating multiple unique identifiers.
🔍 Validation
Validate UUID format and extract version and variant information. Supports both hyphenated and plain formats.
Free Online UUID Generator & Validator
Generate Universally Unique Identifiers (UUIDs) instantly with our free online UUID generator. Support for UUID v1 (timestamp-based) and v4 (random) with bulk generation and format validation. All UUID generation happens locally in your browser for maximum privacy.
What are UUIDs?
A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information in computer systems. UUIDs are standardized by RFC 4122 and are designed to be unique across space and time without requiring a central registration authority.
UUID Versions
- UUID v1: Timestamp-based UUIDs that include the current time and MAC address (or random node). Useful when you need time-ordered identifiers.
- UUID v4: Random UUIDs generated using cryptographically secure random numbers. Most commonly used version for general purposes.
- NIL UUID: Special UUID with all bits set to zero (00000000-0000-0000-0000-000000000000). Used as a placeholder or null value.
Common Use Cases
- Database primary keys and unique identifiers
- Distributed systems and microservices
- Session IDs and tracking tokens
- File and document identifiers
- API request IDs and correlation IDs
- Message queue identifiers
- Cache keys and temporary identifiers
UUID Formats
UUIDs can be represented in two formats:
- Hyphenated: Standard format with hyphens (8-4-4-4-12), e.g., 550e8400-e29b-41d4-a716-446655440000
- Plain: 32 hexadecimal characters without hyphens, e.g., 550e8400e29b41d4a716446655440000
Privacy & Security
All UUID generation and validation happens locally in your browser. Your UUIDs never leave your device, ensuring complete privacy. UUID v4 uses the Web Crypto API for cryptographically secure random number generation.