UUID Generator

A UUID Generator is a unique identifier utility used to create standard 128-bit labels for database keys, session IDs, and software objects. This tool is essential for software architects and database admins generating primary keys that don't collide, seeding databases, and tracking distributed transactions.

The generation engine handles the randomness through the RFC 9562 standard (formerly RFC 4122):

1. Randomness Source: Uses built-in cryptographic primitives (crypto.getRandomValues) to ensure high entropy.
2. Formatting:
   • Version 4: Sets specific bits to denote "Random" variant.
   • Structure: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (8-4-4-4-12 hex digits).
3. Variant Checks: Ensures the "Variant" bits are set correctly (typically 8, 9, A, or B) for compatibility.

The History of Uniqueness

How to count without counting.

• The Problem: If two servers generate an ID "100" at the same time, the database crashes.
• The Solution: UUIDs. With $3.4 \times 10^{38}$ possible values, two servers can generate IDs forever and never pick the same one.
• The Standard: RFC 9562 defines how everyone should generate them, superseding the original RFC 4122.

Technical Comparison: Versions

Which to use?

Version	Source	Use Case
v1	Time + MAC	Legacy
v4	Random	General Purpose
v5	SHA-1 Hash	Deterministic names
v7	Time + Random	Database Keys

By using this tool, you ensure your Data Integrity.

Security and Privacy Considerations

Your generation is performed in a secure, local environment:

• Local Logical Execution: All generation logic is performed locally in your browser. Your IDs never touch our servers.
• Zero Log Policy: We do not store or track your inputs. Your Database Keys and Session Tokens remain entirely confidential.
• W3C Security Compliance: The tool operates within the standard browser sandbox, ensuring no interaction with your local file system or Private Metadata.
• Privacy First: To maintain absolute Data Privacy, the tool functions as an anonymous utility.