Password And Security

UUID Generator

Generate Universally Unique Identifiers

UUID Version

Namespace

Custom Namespace (UUID)

Name

Count

UUID Versions

v1: Time-based (timestamp + MAC)
v3: Name-based (MD5 hash)
v4: Random (most common)
v5: Name-based (SHA1 hash)

When to Use

Database primary keys
API request IDs
Session tokens
Distributed systems

The UUID Generator is a free online tool that creates Universally Unique Identifiers (UUIDs) in various versions. Generate UUID v1, v3, v4, and v5 instantly. Perfect for database keys, API identifiers, session tokens, and distributed systems. All processing happens locally in your browser for complete privacy and security.

What is UUID Generator?

The UUID Generator is a powerful free online tool that creates Universally Unique Identifiers (UUIDs) in various versions. Generate UUID v1, v3, v4, and v5 instantly. Perfect for database keys, API identifiers, session tokens, and distributed systems.

Why Use UUIDs?

UUIDs (Universally Unique Identifiers) are 128-bit identifiers that are guaranteed to be unique across space and time. They are essential for distributed systems, database keys, API identifiers, and session management.

Unlike other tools that only generate one version, our tool supports multiple UUID versions including v1 (time-based), v4 (random), and v5 (name-based).

How to Use This Tool

Using the UUID Generator is simple and straightforward:

Select Version: Choose from UUID v1, v3, v4, or v5.
Generate: Click "Generate UUID" to create a new identifier.
Copy: Copy the generated UUID to your clipboard.
Multiple: Generate multiple UUIDs at once.
Clear: Reset the tool with one click.

Key Features

Multiple Versions: UUID v1, v3, v4, v5
Bulk Generation: Generate up to 100 UUIDs at once
Copy All: Copy all generated UUIDs with one click
Clear All: Reset the tool with one click
Privacy First: All processing is local
Responsive Design: Works on all devices

Perfect For

This tool is ideal for developers, database administrators, system architects, and anyone who needs unique identifiers for their applications.

Related Tools

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Frequently Asked Questions

What is a UUID and why use it?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. It's used for database keys, API identifiers, session tokens, and distributed systems where unique identification is critical.

What are the differences between UUID versions?

UUID v1 is time-based using timestamp and MAC address. UUID v3 and v5 are name-based using MD5 and SHA1 respectively. UUID v4 is random-based and is the most commonly used version. v4 is recommended for most applications.

How many UUIDs can I generate at once?

You can generate up to 100 UUIDs at once using the count selector. This is useful for batch operations, database seeding, or when you need multiple unique identifiers at the same time.

Can I use custom namespaces for v3/v5 UUIDs?

Yes, you can use custom namespaces for UUID v3 and v5. Select "Custom" from the namespace dropdown and enter a valid UUID as the namespace. This allows you to create name-based UUIDs in your own namespace.