UUID Generator Generate Unique Identifiers v1, v4, v5, v7

Generate UUIDs in multiple formats including time-based (v1), random (v4), name-based (v5), and sortable time-ordered (v7) versions. Features bulk generation, timestamp extraction, format validation, and comprehensive UUID analysis for developers.

🎯 Multiple Versions

📦 Bulk Generation

⏰ Timestamp Extraction

📥 Download DevHelper 👀 See Features

Advanced UUID Generation Features

Everything you need for professional UUID generation, analysis, and management in development workflows.

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Multiple UUID Versions

Generate UUIDs in v1 (time-based), v4 (random), v5 (name-based SHA-1), and v7 (time-ordered) formats. Each version serves different use cases and requirements.

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Bulk Generation

Generate hundreds or thousands of UUIDs at once for testing, data seeding, and batch operations. Configurable quantity with instant generation.

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Timestamp Extraction

Extract and display timestamps from UUID v1 and v7 with human-readable date conversion. Perfect for debugging and data analysis.

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Format Validation

Validate UUID format and detect version type from existing UUIDs. Comprehensive syntax checking with detailed error reporting.

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UUID Analysis

Analyze UUID structure, extract version information, timestamp data, and provide detailed breakdown of UUID components.

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Multiple Formats

Output UUIDs in various formats including standard hyphenated, uppercase, lowercase, and programming language specific formats.

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Custom Namespaces

Generate UUID v5 with custom namespaces and names for deterministic, reproducible unique identifiers based on input data.

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Instant Generation

Lightning-fast UUID generation with no delays. Generate single UUIDs instantly or process bulk requests efficiently.

UUID Version Guide

Understanding the different UUID versions and their specific use cases

Time-Based UUID

xxxxxxxx-xxxx-1xxx-xxxx-xxxxxxxxxxxx

Based on: MAC address + timestamp

Use cases: Database primary keys, distributed systems, when you need sortable IDs by time

Pros: Sortable by time, includes timestamp information

Cons: May reveal MAC address, not fully random

Random UUID

xxxxxxxx-xxxx-4xxx-xxxx-xxxxxxxxxxxx

Based on: Random or pseudo-random numbers

Use cases: General purpose, API keys, session tokens, most common choice

Pros: Cryptographically random, no privacy concerns

Cons: Not sortable, no embedded information

Name-Based UUID (SHA-1)

xxxxxxxx-xxxx-5xxx-xxxx-xxxxxxxxxxxx

Based on: SHA-1 hash of namespace + name

Use cases: When you need deterministic UUIDs, content addressing

Pros: Reproducible, deterministic from input

Cons: Predictable if input is known

Time-Ordered UUID

xxxxxxxx-xxxx-7xxx-xxxx-xxxxxxxxxxxx

Based on: Unix timestamp + random data

Use cases: Modern applications, database performance, time-sortable random IDs

Pros: Sortable, efficient for databases, no privacy issues

Cons: Newer standard, limited support in some systems

How to Use UUID Generator

Generate and analyze UUIDs in just a few simple steps.

Select UUID Version

Choose the appropriate UUID version (v1, v4, v5, v7) based on your use case and requirements.

Configure Options

Set generation quantity for bulk operations, choose output format, and configure version-specific options like namespaces for v5.

Generate UUIDs

Click generate to create your UUIDs instantly. View results with formatting options and additional analysis information.

Copy & Analyze

Copy individual UUIDs or bulk results. Use the analysis feature to extract timestamps and validate existing UUIDs.

Perfect for These Development Tasks

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Database Primary Keys

Generate unique primary keys for database records, especially in distributed systems where auto-increment isn't suitable. UUID v7 recommended for performance.

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API Keys & Tokens

Create unique API keys, session tokens, and authentication identifiers. UUID v4 provides cryptographic randomness for security applications.

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Testing & Data Seeding

Generate bulk UUIDs for test data, database seeding, and load testing scenarios. Bulk generation saves time in development and testing workflows.

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File & Resource IDs

Create unique identifiers for files, uploads, resources, and content management systems. Ensures global uniqueness across distributed storage.

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Distributed Systems

Generate conflict-free identifiers for microservices, distributed databases, and multi-node applications without coordination overhead.

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Analytics & Tracking

Create unique tracking IDs, event identifiers, and analytics markers. Time-based versions (v1, v7) provide chronological ordering benefits.

Frequently Asked Questions

Which UUID version should I use?

UUID v4 is the most common choice for general purposes due to its randomness. Use v7 for database primary keys (better performance), v1 if you need time sorting, and v5 for deterministic UUIDs from input data.

Are UUIDs truly unique globally?

Yes, UUIDs are designed for global uniqueness. The probability of collision is astronomically small - approximately 1 in 5.3 x 10^36 for UUID v4, making them effectively unique.

Can I extract timestamps from UUIDs?

Yes, from UUID v1 and v7. DevHelper automatically detects time-based UUIDs and extracts the embedded timestamp, converting it to human-readable date format for analysis.

What's the difference between UUID and GUID?

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) refer to the same concept. GUID is Microsoft's term, while UUID is the RFC standard terminology.

How many UUIDs can I generate at once?

DevHelper supports bulk generation of thousands of UUIDs in a single operation. The exact limit depends on your system's memory, but typical usage supports generating 1000+ UUIDs instantly.

Is UUID v7 better than v4 for databases?

Yes, UUID v7 is generally better for database primary keys because it's time-ordered, which improves database performance, reduces index fragmentation, and maintains insertion order.