Generate UUID v4 Identifiers
Create random UUID v4 identifiers for databases, APIs, and software applications.
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UUID Generator – Free UUID v4 & GUID Generator
Generate UUID v4 identifiers and GUIDs instantly for development, APIs, databases, testing, and applications. Create one UUID or generate multiple unique identifiers in bulk.
100% free, no signup
Your files are processed in your browser and never uploaded to any server.
How to use this tool
- 1Choose the number of UUIDs you want to generate.
- 2Select your preferred UUID format, such as uppercase or without hyphens.
- 3Click Generate UUID to create your identifiers instantly.
- 4Copy an individual UUID or copy the complete generated list.
- 5Use the generated UUIDs in your application, database, API, or testing workflow.
UUID Generator | Free UUID v4 & GUID Generator Features
Bulk UUID Generation
Generate multiple UUIDs at once — perfect for database seeding, test data, and batch workflows.
Customizable Format
Choose uppercase or hyphen-free UUID formats to match your application's requirements.
Copy with One Click
Copy individual UUIDs or the entire generated list with one click for immediate use.
Privacy-Focused
All UUID generation happens locally in your browser, ensuring your data remains private and secure.
Free & No Signup
Generate unlimited UUIDs for free without creating an account or registering.
What Is a UUID Generator?
A UUID (Universally Unique Identifier) Generator is a tool that creates unique 128-bit identifiers using the UUID v4 standard. These identifiers are used to uniquely identify records, resources, users, and objects in software applications.
UUID v4 generates identifiers using random values, making them suitable for distributed systems where uniqueness across different databases or environments is required.
How to Generate UUIDs Online
Using our UUID Generator is simple. Choose how many UUIDs you want to generate, select your preferred format (uppercase or without hyphens), and click Generate UUID.
You can then copy individual UUIDs or copy the entire list to use in your application, database, or API.
UUID Generator for Developers
Developers use UUIDs to generate unique identifiers for database primary keys, API resources, session IDs, transaction IDs, and user profiles.
Our tool is designed for fast, reliable UUID generation without needing to use command-line tools or external libraries.
UUID vs GUID: What's the Difference?
UUID and GUID generally refer to the same concept: a 128-bit unique identifier. UUID is the more widely used generic term, while GUID (Globally Unique Identifier) is commonly used in Microsoft and Windows development.
Our tool generates UUID v4 identifiers that can be used in any environment that requires either UUID or GUID.
Bulk UUID Generation for Testing & Seeding
When testing applications or seeding databases, you often need multiple unique identifiers. Our bulk UUID generation feature lets you create as many UUIDs as you need with one click.
This saves time and ensures your test data and database records have unique IDs.
Is the UUID Generator Private?
Yes. All UUID generation happens locally in your browser. The generated identifiers are not uploaded to any server, keeping your data and use cases private.
This makes our UUID Generator safe for use in development, testing, and production environments.
Frequently asked questions
What is a UUID?+
A UUID is a 128-bit identifier used to uniquely identify records, resources, users, objects, files, and other data in software systems.
What is UUID v4?+
UUID v4 is a randomly generated UUID format. It uses random values to create identifiers with an extremely low probability of collision.
Is this UUID Generator free?+
Yes. You can generate UUID v4 identifiers for free without creating an account or registering.
Can I generate UUIDs online?+
Yes. This online UUID Generator creates UUID v4 identifiers directly in your browser without requiring additional software.
Can I generate multiple UUIDs at once?+
Yes. The tool supports bulk UUID generation, allowing you to create multiple UUID v4 identifiers in a single operation.
Can I generate a GUID?+
Yes. GUID and UUID commonly refer to the same 128-bit identifier concept. This tool generates UUID v4 values that can be used where GUID-style identifiers are required.
Are UUIDs generated randomly?+
Yes. UUID v4 identifiers are based on random values generated using the browser's cryptographically secure random number functionality.
Are generated UUIDs unique?+
UUID v4 collisions are extremely unlikely when generated correctly, making them suitable for most application, database, API, and testing use cases.
Can I remove hyphens from a UUID?+
Yes. You can generate UUIDs without hyphens when your application requires a compact identifier format.
Can I generate uppercase UUIDs?+
Yes. You can format generated UUIDs using uppercase letters when that format is more convenient for your project.
Can I use generated UUIDs in MySQL?+
Yes. UUID values can be used with MySQL databases for identifying records, although the exact storage format should be chosen based on your application's requirements.
Can I use UUIDs in PostgreSQL?+
Yes. PostgreSQL has native UUID support, making UUIDs a common choice for identifying database records.
Can I use UUIDs for API resources?+
Yes. UUIDs are commonly used as identifiers for API resources, records, users, orders, transactions, and other application objects.
Can I use UUIDs for database IDs?+
Yes. UUIDs can be used as database identifiers when an application benefits from globally unique IDs instead of sequential numeric IDs.
Are generated UUIDs stored on a server?+
The UUID generation is performed locally in your browser, so the generated values do not need to be uploaded to a server for generation.
Does the UUID Generator require an account?+
No. You can generate UUIDs without signing up, logging in, or creating an account.
Can I use this UUID Generator for testing?+
Yes. Developers can generate UUIDs for software testing, database seeding, mock data, API development, and other development workflows.
What is the difference between UUID and GUID?+
UUID and GUID generally describe the same type of 128-bit identifier. UUID is the more widely used generic term, while GUID is commonly used in Microsoft and Windows development.
What is an RFC 4122 UUID?+
RFC 4122 defined formats and procedures for UUIDs. UUID v4 is one of the commonly used UUID versions based on randomly generated values.
Can I copy generated UUIDs?+
Yes. You can copy individual UUID values or copy the generated list for use in your code, database, API, or testing environment.
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