Instant Generation
Generate UUIDs with a single click. No delays, no waiting.
UUID Generator
Generate UUID v4 (Universally Unique Identifier) instantly. One-click generation with copy to clipboard.
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Why Use Our UUID Generator?
Batch Generation
Generate up to 100 UUIDs at once for bulk needs.
Multiple Formats
Choose uppercase/lowercase and with/without braces.
UUID v4 Standard
Generates RFC 4122 compliant UUID version 4 (random).
What is UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier that is practically guaranteed to be unique. UUIDs are commonly used in software development for database IDs, session tokens, and any application requiring unique identifiers.
UUID Format
A UUID consists of 32 hexadecimal digits, displayed in 5 groups separated by hyphens:
- 8 digits - 4 digits - 4 digits - 4 digits - 12 digits
- Example:
550e8400-e29b-41d4-a716-446655440000
UUID Versions
- UUID v1: Based on timestamp and MAC address
- UUID v4: Randomly generated (most common)
- UUID v5: Name-based using SHA-1
UUID v4 Details
UUID v4 is generated using random or pseudo-random numbers. The format includes specific bits set to indicate version 4:
- Version: 4 (bits 12-15 of byte 6)
- Variant: RFC 4122 (bits 16-18 of byte 8)
- Total combinations: 2^122 (approximately 3.4 × 10^38)
Common Uses
- Database primary keys
- Session identifiers
- Distributed system IDs
- Transaction IDs
- API keys and tokens