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UUID/GUID Generator

Generate UUID/GUID identifiers in v1, v4, v7, or nil form with timestamp annotations, bulk output, and flexible formatting options.

UUID Generator Settings

Quick Examples

Configuration

Choose UUID version to generate

Number of UUIDs to generate (1-100)

Choose output format style

Generated UUIDs

How It Works

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Select UUID Version & Format

Pick v1, v4, v7, or nil identifiers. Configure casing, compact vs. hyphenated output, brace wrapping, and optional timestamp metadata.

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Set Quantity & Options

Generate single or bulk UUID sets with configurable counts. Toggle timestamp annotations and history tracking for reproducibility.

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Generate Secure Identifiers

UUIDs are generated locally via Web Crypto APIs or hardened fallbacks, ensuring high-quality randomness and privacy for sensitive workflows.

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Export & Integrate

Copy UUIDs, download lists, or push them into tool history for audit trails. Perfect for seeding databases, tests, and distributed tracing.

Problems It Solves

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Problem

Manual UUID generation slows development environments and increases the chance of reuse or collision.

Solution

Create hundreds of UUIDs instantly with crypto-backed randomness, ensuring unique identifiers for staging and production assets.

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Problem

Teams need deterministic formatting (uppercase, compact, braces) to match API expectations and database schemas.

Solution

Configure output casing and formatting per run, keeping APIs, logs, and documentation aligned without manual string manipulation.

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Problem

Audits require timestamp correlation or historical context for generated IDs used in deployments.

Solution

Include generation timestamps and store runs in history so ops teams can trace when identifiers were created.

Why Choose This Tool

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Client-Side Reliability

No identifiers leave your browser. Ideal for regulated environments and offline-friendly workflows.

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Comprehensive Version Support

Generate v1 for legacy systems, v4 for random IDs, v7 for time-sortable identifiers, or nil UUIDs for protocol defaults.

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Developer-Centric UX

Keyboard shortcuts, copy/download controls, and persistent history keep repetitive ID generation quick during development and testing.

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Integration Ready

Export results in standard, compact, uppercase, or brace formats to drop directly into configuration files, YAML manifests, or API payloads.

Frequently Asked Questions

What's the difference between UUID versions?
v1 uses timestamp + MAC address (traceable), v4 is random (most common), v7 is timestamp-based but more privacy-friendly than v1.
Are UUIDs truly unique?
UUIDs have extremely low collision probability. v4 UUIDs have about 1 in 5.3 billion chance of collision when generating 1 billion UUIDs.
Should I use UUID or GUID?
UUID and GUID are essentially the same thing. GUID is Microsoft's term, UUID is the RFC standard term. They're interchangeable.
Which UUID version should I use?
Use v4 for general purposes (random), v1 if you need time ordering but don't mind MAC address exposure, v7 for time-ordered with better privacy.
Can I use UUIDs as database primary keys?
Yes, but consider performance implications. UUIDs are larger than integers and can cause index fragmentation. Use binary storage format when possible.

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