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UUID Generator v1

Generate time-based UUIDs (version 1).

How to Use This Tool

  1. Click the "Generate UUID v1" button.
  2. The tool will generate a new time-based UUID v1.
  3. Click the "Copy" button to copy the generated UUID to your clipboard.
  4. Paste the UUID into your application or system as needed.

Learn More About UUID Generator v1

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) and are designed to ensure uniqueness across space and time.

UUID Versions

There are several versions of UUIDs, each with its own method of generation:

  • Version 1: Time-based UUIDs, generated using a timestamp and a MAC address. Our UUID Generator v1 creates these.
  • Version 3: MD5 hash-based UUIDs, generated by hashing a namespace identifier and a name.
  • Version 4: Random UUIDs, generated using random numbers. See also: UUID Generator v4.
  • Version 5: SHA-1 hash-based UUIDs, generated by hashing a namespace identifier and a name.
  • Version 7: Combines a Unix timestamp with random bits for improved database performance. Consider using the UUID v7 Generator.

Version 1 UUID Details

Version 1 UUIDs consist of the following parts:

  • Timestamp: A 60-bit timestamp representing the number of 100-nanosecond intervals since October 15, 1582.
  • Clock Sequence: A 14-bit sequence number used to prevent collisions when the timestamp is reset.
  • Node ID: A 48-bit MAC address identifying the machine that generated the UUID.

Benefits of Version 1 UUIDs

  • Uniqueness: Guarantees uniqueness across distributed systems.
  • Time-based: Provides information about the order in which UUIDs were generated.

Considerations

  • Privacy: Contains the MAC address of the generating machine, which can raise privacy concerns. If privacy is a concern, consider using version 4 UUIDs or other methods.
  • Clock Drift: Accuracy depends on the accuracy of the system clock.

About UUID Generator v1

The UUID Generator v1 is a tool designed to create unique, time-based identifiers for distributed systems. By incorporating timestamps and hardware details, it helps ensure each UUID is distinct and traceable. This tool is suited for developers and system architects who need reliable and compliant UUIDs for their applications.
Generate unique, time-based UUIDs for distributed systems.
UUID Version
1
Type
Time-based
Compliance
UUID specification

Examples

Generating a UUID for a new database entry

Use the UUID Generator v1 to create a unique identifier for a new record in a distributed database.
Input
Click 'Generate UUID'
Output
f47ac10b-58cc-4372-a567-0e02b2c3d479

Features

Time-based Generation

Creates UUIDs using the current timestamp for chronological ordering.

Hardware Information

Incorporates hardware details to help ensure uniqueness across nodes.

Standard Compliance

Adheres to the UUID version 1 specification for compatibility.

Use Cases

  • Generating unique identifiers for database entries in distributed systems.
  • Creating traceable logs with time-based UUIDs for auditing.
  • Ensuring unique session IDs in web applications.

Frequently Asked Questions

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