UUID1 Generator

Generate time-based UUIDs with MAC address

Quantity:Qty:

UUID1

Click 'Generate' to create your first UUID1

History

History is stored locally only and not sent to any server

No history yet

Generate values to see your history here

Technical Details

Version

1 (Time-based)

Length

36 characters

Format

8-4-4-4-12

Sortability

Time-based

Structure Breakdown

Time Low (32 bits):Current timestamp

Time Mid (16 bits):Middle timestamp

Time High (16 bits):1xxx (version 1)

Clock Seq (16 bits):[8-B]xxx (variant)

Node (48 bits):MAC address

Privacy & Applications

Privacy Consideration

UUID1 includes MAC address information, which could potentially be used for tracking. For privacy-sensitive applications, consider using UUID4 or UUID7.

Best Use Cases

Legacy system integration
Timestamp-based ordering
Distributed systems coordination
Hardware-based uniqueness
Event logging with timeline

Technical Characteristics

Uniqueness:

MAC + Time based

Collision Risk:

Very Low

Predictability:

Partially Predictable

Database Performance:

Mixed