UUID Generator

Generate secure UUID/GUID strings in multiple versions and formats with bulk generation support

✨ Multiple UUID Versions (v1, v4, v5) ✨ Bulk Generation (up to 100) ✨ Multiple Output Formats ✨ Instant Copy & Download ✨ Name-based UUID Support ✨ Privacy-First Generation ✨ No Registration Required ✨ Secure Random Generation

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UUID Version

UUID v1

Time-based

UUID v4

Random (recommended)

UUID v5

Name-based

Generation Options

Quantity

Format

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About This Tool

Our UUID Generator is a powerful, free online tool that creates secure universally unique identifiers (UUIDs) in multiple versions and formats. Whether you're a developer initializing databases, a system architect designing APIs, or anyone who needs unique identifiers, this tool provides fast, secure, and reliable UUID generation with extensive customization options.

Key Features:

Multiple UUID Versions: Support for UUID v1 (time-based), v4 (random), and v5 (name-based)
Bulk Generation: Generate up to 100 UUIDs at once for large-scale projects
Flexible Formatting: Standard, compact, uppercase, and braces formats
Name-based UUIDs: Create deterministic UUIDs using namespace and name combinations
Instant Export: Copy individual UUIDs or download all as a text file
Secure Generation: Uses cryptographically secure random number generation
Privacy First: All generation happens locally in your browser
No Limits: Generate as many UUIDs as you need, completely free

Perfect For:

Database record initialization and primary keys
API development and microservices identification
Distributed system node identification
Session management and security tokens
File and resource naming in cloud systems
Testing and development data generation
Any scenario requiring guaranteed unique identifiers

How to Use

Choose UUID version: Select UUID v1 (time-based), v4 (random - recommended), or v5 (name-based) depending on your needs.
Configure v5 settings (if selected): For UUID v5, choose a namespace (DNS, URL, OID, X500) and provide the name to generate UUID for.
Set generation options:
- Specify quantity (1-100 UUIDs)
- Choose output format (standard, compact, uppercase, braces)
Generate UUIDs: Click "Generate UUIDs" to create your identifiers instantly.
Copy or download: Copy individual UUIDs, copy all at once, or download as a text file for bulk usage.

💡 Pro Tips:

• Use UUID v4 for most applications - it's random and doesn't reveal system information
• UUID v1 includes timestamp - avoid if privacy is a concern
• UUID v5 is perfect when you need the same input to always generate the same UUID
• Compact format is ideal for URLs and systems with character limits
• Generate in bulk for database seeding and testing scenarios

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Frequently Asked Questions

What's the difference between UUID versions?

UUID v1 is time-based, v4 is random (most common), and v5 is name-based using deterministic hashing. V4 is recommended for most use cases due to better privacy and randomness.

Are the generated UUIDs truly unique?

UUID v4 has an extremely low probability of collision (1 in 2^122), making them practically unique. V1 UUIDs are time-based, and v5 UUIDs are deterministic based on name and namespace.

Can I generate UUIDs in bulk?

Yes! You can generate up to 100 UUIDs at once. Use the quantity field to specify how many UUIDs you need, perfect for database initialization or testing.

What output formats are supported?

We support standard format (with hyphens), compact (no hyphens), uppercase, and with braces { }. Choose the format that matches your application requirements.

How does UUID v5 work?

UUID v5 generates deterministic UUIDs based on a namespace and name. The same namespace + name combination will always produce the same UUID, making it useful for consistent identifier generation.

Are my UUIDs secure and private?

Absolutely! All UUID generation happens in your browser using secure random number generation. No UUIDs are sent to our servers or stored anywhere.

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