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      "@type": "Organization",
      "name": "Online UUID Generator"
    },
    "publisher": {
      "@type": "Organization", 
      "name": "Online UUID Generator"
    },
    "mainEntityOfPage": {
      "@type": "WebPage",
      "@id": "https://online-uuid-generator.com/versions/v1/"
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  }

---

Online UUID Generator - Version 1

UUID Version 1 generates unique identifiers using the current timestamp, a clock sequence, and the device's MAC address. The timestamp ensures uniqueness over time, while the MAC address ensures uniqueness across different machines.

Pros:

• Globally Unique: Guaranteed uniqueness even across different devices.
• Roughly Sortable: Useful for indexing since it's timestamp-based.

Cons:

• Privacy Concerns: Embeds the device's MAC address, potentially exposing network details.
• Predictable: Can be guessed due to its time-based nature.

Best for: Distributed systems where global uniqueness is required, and privacy is not a concern.

Related UUID Versions

Compare with other versions:

• UUID Version 3 - MD5 namespace-based (deterministic)
• UUID Version 4 - Random (most popular choice)
• UUID Version 5 - SHA-1 namespace-based (more secure than v3)
• UUID Version 6 - Improved time-ordered version of v1
• UUID Version 7 - Modern time-based with better sorting

Popular implementation guides:

• JavaScript - Most popular for web development
• Python - Built-in uuid module, great for data science
• Java - Enterprise applications and Android development
• Go - High-performance microservices
• **View all languages →

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