UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information. Written as 32 hexadecimal digits in 5 groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.

What is the difference between UUID and GUID?

GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are the same format and can be used interchangeably.

How unique are UUID v4 values?

UUID v4 has 122 bits of randomness. The probability of generating two identical UUIDs is so astronomically small it is effectively impossible in practice.

Should I use UUIDs as database primary keys?

UUIDs are good for distributed systems where multiple databases generate IDs independently. For single-server systems, auto-incrementing integers are simpler and more storage-efficient.

أدوات المطور

توليد معرفات فريدة بسهولة.

مولد UUID

توليد معرفات فريدة بسهولة.

100% غير متصلالخصوصية أولاًفوري

توليد UUID

تنسيق UUID

توليد عدة UUID: 1

1100

11050100

Learn more about UUID Generator

About UUID Generator

Generate one or many UUIDs (version 4) instantly in your browser. UUIDs are 128-bit identifiers used as primary keys in databases, session tokens, file names, and distributed systems where uniqueness is required.

Key features

Generates UUID v4 (random) by default
Bulk generation — generate 1 to 1000 UUIDs at once
Both hyphenated and compact (no hyphens) formats
Copy all generated UUIDs to clipboard at once
Generated locally — never sent to any server

How to use UUID Generator

1Click "Generate UUID" for a single random UUID
2Set the quantity field and click "Generate" for bulk UUIDs
3Toggle between hyphenated and compact format
4Copy one or all generated UUIDs

Frequently asked questions

What is a UUID?: UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information. Written as 32 hexadecimal digits in 5 groups: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
What is the difference between UUID and GUID?: GUID (Globally Unique Identifier) is Microsoft's term for UUID. They are the same format and can be used interchangeably.
How unique are UUID v4 values?: UUID v4 has 122 bits of randomness. The probability of generating two identical UUIDs is so astronomically small it is effectively impossible in practice.
Should I use UUIDs as database primary keys?: UUIDs are good for distributed systems where multiple databases generate IDs independently. For single-server systems, auto-incrementing integers are simpler and more storage-efficient.