UUID v4 Generator
Generate RFC-compliant UUID version 4 identifiers.
What is a UUID v4 Generator and How Does It Work?
A UUID v4 Generator creates version 4 Universally Unique Identifiers following the RFC 4122 specification. These 128-bit identifiers are generated using random numbers and are globally unique.
How to Use Our Free UUID v4 Generator Online
Click 'Generate' to create UUID v4 identifiers. Set the count for bulk generation. Copy individual UUIDs or all results. Choose between standard and compact (no dashes) format.
When You Might Need a UUID v4 Generator
Use this for database keys, distributed system identifiers, file naming, API identifiers, or any scenario requiring globally unique IDs.
RFC 4122 v4 UUIDs for Database Primary Keys and API Responses
UUID v4 is the most widely used version in modern web development. Frameworks like Rails, Django, and Laravel support it natively. Generate a batch of compliant UUIDs and paste them directly into migration scripts, Postman requests, or seed files.
UUID v4 Generator: Frequently Asked Questions
What makes v4 different from other UUID versions?
Version 4 UUIDs are purely random, unlike v1 (time-based) or v5 (name-based).
Are they RFC 4122 compliant?
Yes, generated UUIDs follow the RFC 4122 v4 specification exactly.
Can I generate UUIDs without dashes?
Yes, toggle the compact format option.