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UUID Generator — Generate UUIDs & GUIDs Instantly

Need a UUID or GUID? Free online tool to generate UUID v1, v4, and GUIDs. Create single or bulk UUIDs in multiple formats. Perfect for developers, databases, and unique identification. Instant generation, no signup required.

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UUID Version 4 (Random)

UUID Settings

Rated by 50,000+ users
5M+ Images Processed100+ Countries100% Browser-Based
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Why Use Our UUID Generator?

Multiple UUID Versions

Generate UUID v1 (time-based), v4 (random), and v7 (time-ordered) — choose the right version for your use case

6 Output Formats

Standard, uppercase, no dashes, braces, URN format, and Base64 — whatever your application requires

Bulk Generation

Generate up to 500 UUIDs at once with sorting, deduplication, and multiple export options

UUID Validator

Validate and decode any UUID — check version, variant, format, and structure

UUID Structure Decoding

See the internal structure of each UUID — timestamp, clock sequence, node, and random bits

Code Snippets for 12 Languages

Ready-to-use UUID generation code in JavaScript, Python, Java, C#, Go, Rust, and more

Generation History

Track generated UUIDs in your session — copy, review, or clear as needed

Completely Free

No signup, no limits — generate as many UUIDs as you need

How to Generate UUIDs — 3 Simple Steps

3 steps
01

1. Choose Version & Format

Select UUID version (v1, v4, v7) and output format (standard, uppercase, no dashes, etc.).
02

2. Generate UUID

Click generate to create a UUID — view its decoded structure and information.
03

3. Copy & Use

Copy the UUID to clipboard, or use bulk mode for multiple UUIDs with export options.
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When You Need a UUID Generator

Database Primary Keys
Use UUIDs as primary keys instead of auto-increment integers for distributed systems
API Development
Generate unique request IDs, transaction IDs, and resource identifiers for REST APIs
File Naming
Create unique file names for uploads, exports, and temporary files
Session Management
Generate unique session tokens and user identifiers for web applications
Distributed Systems
Create identifiers that are unique across multiple servers without coordination
Testing & Development
Generate test data, mock IDs, and sample identifiers during development

Why Use Our UUID Generator?

Our UUID generator provides more than simple UUID generation — it supports multiple versions (v1, v4, v7), six output formats, bulk generation up to 500 UUIDs, built-in validation with error details, UUID structure decoding, and ready-to-use code snippets for 12 programming languages. Everything generates instantly in your browser with no signup required.

3 UUID Versions

v1 (time-based), v4 (random), v7 (time-ordered)

6 Output Formats

Standard, uppercase, no dashes, braces, URN, Base64

Bulk Generation

Up to 500 UUIDs with sorting and deduplication

UUID Validator

Validate and decode any UUID with error details

Structure Decoding

See timestamp, clock, node, and random bits

12 Language Snippets

Ready code for JS, Python, Java, C#, Go, and more

Export Options

Download as .txt or .csv, copy all to clipboard

Free & Unlimited

No signup, no limits — generate unlimited UUIDs

UUID Generator — Complete Guide to Generating Unique Identifiers

Need a UUID or GUID? Universally Unique Identifiers (UUIDs) are 128-bit values used to uniquely identify information in computer systems. They're essential for databases, APIs, distributed systems, and anywhere unique identification is needed. Our free UUID generator creates UUIDs in multiple versions and formats, with bulk generation, validation, and developer tools — all generated instantly in your browser.

How to Generate UUIDs

Generating UUIDs is simple: 1. Select UUID version (v4 for general use, v7 for sortable, v1 for time-based) 2. Choose output format (standard, uppercase, no dashes, braces, URN, or Base64) 3. Click 'Generate UUID' 4. Copy the UUID to clipboard For multiple UUIDs, enable bulk mode to generate up to 500 at once. Use the validator to check existing UUIDs. Copy code snippets to generate UUIDs in your own applications.

Common UUID Use Cases

UUIDs are used across software development: • Database keys — Primary keys for distributed databases • API identifiers — Request IDs, resource IDs, transaction tracking • File management — Unique file names for uploads and exports • Authentication — Session tokens, API keys, user identifiers • Distributed systems — IDs that don't require central coordination • Testing — Generate predictable test data and mock identifiers Our generator supports all these scenarios with flexible output options.

UUID Versions Explained: v1, v4, and v7

Choose the right UUID version: • UUID v1 — Time-based using timestamp and MAC address. Sortable and traceable to the generating device. Best for: logging, auditing, tracing. • UUID v4 — Completely random. No embedded information, maximum uniqueness. Best for: general-purpose IDs, security-sensitive contexts. • UUID v7 — Timestamp-prefixed with random suffix. Sortable like v1, random like v4. Best for: database primary keys, modern applications. Our generator supports all three versions with clear explanations.

UUID Format Options

UUIDs can be represented in multiple formats: • Standard: 550e8400-e29b-41d4-a716-446655440000 (most common) • No Dashes: 550e8400e29b41d4a716446655440000 (compact storage) • Uppercase: 550E8400-E29B-41D4-A716-446655440000 • Braces: {550e8400-e29b-41d4-a716-446655440000} (Microsoft registry style) • URN: urn:uuid:550e8400-e29b-41d4-a716-446655440000 • Base64: Compressed 22-character representation Our tool generates all formats for maximum compatibility.

Start Generating: Create UUIDs Today

Generate UUIDs and GUIDs instantly with our free tool. Multiple versions, six formats, bulk generation, validation, structure decoding, and code snippets for 12 languages. 100% free, unlimited generation, no signup required.

Frequently Asked Questions About UUID Generator

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