UUID Generator Online for Developers
Use this free UUID Generator Online to create unique identifier strings for development, testing, APIs, databases, web applications, and other software projects. You can generate a single UUID or use the bulk UUID generator to create up to 1,000 values in one operation.
The tool supports UUID v4 for random identifiers and UUID v1 for timestamp-based identifiers. You can also choose uppercase or lowercase output and keep the standard hyphens or remove them when a system requires a compact UUID string. The browser-based workflow is available to users in the USA, UK, India, and other regions.
How to Generate a UUID Online
- Select UUID v4 for random identifiers or UUID v1 for timestamp-based identifiers.
- Enter the number of UUIDs you need, from 1 to 1,000.
- Choose uppercase or lowercase output and select whether to keep hyphens.
- Click Generate UUIDs.
- Copy the generated UUIDs or download them as a text file.
UUID v4 and UUID v1
A UUID v4 generator creates identifiers using random values and the UUID version and variant bits required by the format. A UUID v1 generator uses a timestamp-based UUID layout with a clock sequence and node identifier. The correct choice depends on the requirements of your application.
Bulk UUID Generator
When a project needs many identifiers, the bulk UUID generator can create up to 1,000 UUIDs at once. Each generated value is placed on its own line, making the result convenient for development data, test records, API examples, database imports, and other workflows.
UUID Formatting Options
The standard UUID text representation contains hexadecimal characters separated into groups with hyphens. This tool lets you choose uppercase or lowercase output and optionally remove hyphens. Formatting changes the displayed string; it does not add or remove the UUID version or variant information.
Using UUIDs in Software Projects
UUIDs are commonly used as identifiers for database records, API resources, application objects, test data, sessions, files, and distributed systems. Before using a generated identifier in production, check the format, uniqueness requirements, storage type, and validation rules of your application.
Browser-Based UUID Generation
UUID generation happens in the browser. No account is required for the core generator. For privacy and security, do not enter passwords, private keys, API secrets, payment information, or other confidential information into an online tool.