What is UUID Generator?
Generate cryptographically random UUID v4 (Universally Unique Identifier) strings for use in databases, APIs, and applications. Generate up to 50 UUIDs at once, with options for uppercase formatting and removing dashes. UUIDs are 128-bit identifiers that are practically guaranteed to be unique across all systems, making them ideal for primary keys, session tokens, and distributed systems.
How to Use UUID Generator
- 1Set how many UUIDs you want to generate (1 to 50)
- 2Choose options: uppercase formatting and/or remove dashes
- 3Click 'Generate' to create your UUIDs
- 4Click 'Copy' next to any UUID to copy it, or 'Copy All' for the entire list
Frequently Asked Questions
A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across all devices and time. The format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 4 indicates version 4 (random). UUIDs are used as database primary keys, API identifiers, session tokens, and more.
UUID and GUID (Globally Unique Identifier) are essentially the same thing. UUID is the standard term used in most programming contexts (RFC 4122), while GUID is the term used primarily by Microsoft. Both refer to the same 128-bit identifier format.
Theoretically yes, but the probability is astronomically low. With UUID v4, you would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a collision. For practical purposes, UUID v4 values are considered universally unique.
UUIDs work well as primary keys in distributed systems where you need to generate IDs without a central authority. The trade-off is that they use more storage (16 bytes vs 4-8 bytes for integers) and can be slower for indexed lookups. Many modern databases handle UUIDs efficiently.
Related Tools
QR
QR Code Generator
Create QR codes from any text or URL instantly
🔒
Password Generator
Generate strong, random passwords with customizable options
PAL
Color Palette Generator
Generate beautiful color palettes from any base color
TMR
Pomodoro Timer
Stay focused with a customizable work/break timer using the Pomodoro technique