🆔 UUID Generator

Professional UUID generator with comprehensive RFC 4122 support including multiple versions, batch generation, custom formatting, and technical analysis for developers and system architects

UUID Version:

Number of UUIDs:

Namespace (for v3/v5):

Name Input (for v3/v5):

Format Style:

Output Format:

Show Technical Analysis:

Show Technical Analysis

Validate RFC 4122 Compliance:

Validate RFC 4122 Compliance

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JavaScript Required:

🆔 JavaScript Required for UUID Generation This UUID generator requires JavaScript for secure random number generation and cryptographic functions. However, here are manual UUID creation methods: 🔧 Manual UUID Generation: • Online UUID generators (use trusted sources) • Command line tools (uuidgen on Unix/Linux/macOS) • Programming libraries (uuid package in Python, Node.js, etc.) • Database functions (NEWID() in SQL Server, UUID() in MySQL) 📖 UUID Format Reference: Standard Format: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx • x: hexadecimal digit (0-9, a-f) • M: version number (1, 3, 4, or 5) • N: variant bits (8, 9, a, or b) 🎯 UUID Versions: • Version 1: Timestamp + MAC address • Version 3: Name-based (MD5 hash) • Version 4: Random (most common) • Version 5: Name-based (SHA1 hash) ⚡ Common Use Cases: • Database primary keys • API request/response tracking • Session identifiers • File naming for distributed systems • Message queue identifiers Enable JavaScript for secure UUID generation with comprehensive analysis and validation.

How to Use This UUID Generator

Basic Usage:

Fill in the required fields above
Adjust any optional settings as needed
Click the button to generate your result
Copy or download the output

Tips: This uuid generator provides instant results and works entirely in your browser for privacy.

When You Might Need This

• Primary key generation for distributed database systems with guaranteed uniqueness
• Foreign key references in microservices architectures requiring global identifier consistency
• RESTful API resource identifiers following industry best practices for URL construction
• Session token generation for stateless authentication systems with cryptographic security
• Distributed system node identification in cluster computing and container orchestration

Frequently Asked Questions

What UUID versions does this generator support and when should I use each?

Our generator supports all major RFC 4122 UUID versions: v1 (timestamp-based with MAC address) for sortable identifiers where creation time matters, v3 (name-based with MD5) for deterministic generation from namespace and name, v4 (random) for maximum security and general use, v5 (name-based with SHA1) for deterministic generation with stronger hashing, and nil UUIDs for null/empty value representation. Version 4 is recommended for most applications due to its cryptographic security and privacy characteristics.

How does the generator ensure RFC 4122 compliance and what validation is performed?

Our generator implements full RFC 4122 compliance through proper bit field formatting, version number encoding, variant field configuration, and cryptographic random number generation. Validation includes format structure verification, version bit checking, variant field validation, hexadecimal character validation, and length verification. The tool provides detailed analysis of each generated UUID including entropy calculations and collision probability estimates.

Can I generate UUIDs in bulk and what export formats are supported?

Yes, you can generate up to 100 UUIDs in a single operation for batch processing scenarios. Export formats include simple list (plain text), JSON arrays for programmatic consumption, CSV format for spreadsheet applications, XML format for structured data exchange, and SQL INSERT statements for direct database integration. All formats maintain RFC 4122 compliance and include optional technical analysis data.

How secure are the generated UUIDs and what cryptographic methods are used?

Version 4 UUIDs use cryptographically secure pseudo-random number generation with 122 bits of entropy, providing collision probabilities of approximately 5.3 × 10⁻³⁷. The generator uses browser-native crypto APIs where available, falling back to high-quality mathematical random number generation. Version 1 UUIDs include timestamp and MAC address components, while versions 3 and 5 use MD5 and SHA1 hashing respectively for deterministic generation.

UUID Generation Results