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Online UUID Generator Tool - Free & Instant | Solvezi
Online UUID Generator Tool - Free & Instant | Solvezi
Generate unique identifiers across all major versions (V1, V3, V4, V5)
A UUID (or GUID) is a 128-bit identifier used to uniquely label information. Its strength lies in decentralized generation, ensuring unique IDs across all systems without coordination.
A standard UUID uses 32 hex digits arranged in 5 groups (8-4-4-4-12) separated by hyphens, totaling 36 characters.
Use Case: Human-readable format for logs, URLs, and general data storage.
Generated purely from random numbers. High entropy and no external data.
Use Case: Primary keys, session tokens, and unique IDs where creation time is not important.
While V4 is dominant, other versions exist for sorting, time-stamping, or derived naming.
Generated using the current timestamp and MAC address. Chronologically sortable.
Use Case: Legacy systems needing IDs ordered by creation time.
Modern time-based alternatives. V7 is the simplest and best choice for sortable primary keys.
Use Case: Optimal for databases requiring global uniqueness and sequential indexing.
Generated by hashing a name (URL/email) with MD5 (V3) or SHA1 (V5).
Use Case: Ensures same input produces the same UUID.
Duplicate V4 UUID probability is extremely small, suitable for massive distributed systems.
Use Case: Useful in IoT or cloud services without centralized control.
UUIDs can be presented in multiple formats for different technical requirements.
Most bits are random, but specific bits identify the version:
4 (first hex digit in third group).10 binary (first hex digit in fourth group will be 8, 9, A, or B).