UUID Generator for Random Version 4 IDs in Your Browser
UUID Generator creates RFC 4122 version-4 (random) UUIDs with the browser’s native crypto.randomUUID method. Generate up to 100 values in one batch, with one UUID per line for easy copying into code, tests, fixtures, or seed data. The tool works in your browser, requires no signup, sends no data to a server, and can be used offline after the page loads.
UUID Generator is a browser-based tool for creating RFC 4122 version-4 (random) UUIDs. It uses the browser’s native crypto.randomUUID method and can generate up to 100 values in one batch, with each UUID displayed on its own line. Use this UUID generator online when you need ready-to-copy identifiers for development work.
To use the tool, set the available options and generate a batch. The main choice is how many UUIDs to create at once, up to the maximum of 100. The generated values are version-4 UUIDs; this tool creates identifiers rather than converting existing files or data between formats.
A UUID is a standardized identifier, and version 4 describes UUIDs generated using random values. Generating a batch can save time when you are preparing test data, fixtures, seed data, mock API examples, or development notes. Each value appears on a separate line, so you can copy the identifiers you need.
UUID Generator runs entirely in your browser. No data is sent to a server, no signup is required, and the tool works offline once the page has loaded. This lets you generate UUIDs without uploading data or relying on a server connection during use.
The tool is useful for developers and DevOps engineers who need sample identifiers for testing, prototyping, documentation, or other development tasks. Whether you are new to UUIDs or preparing a batch for an established workflow, you can generate up to 100 random version-4 values at a time.
Step 1: Open UUID Generator in your browser. You can create a batch without signing up or sending data to a server.
Step 2: Set the available options, including how many UUIDs to generate. You can generate up to 100 values at once.
Step 3: Generate the UUIDs. Each RFC 4122 version-4 value appears on its own line.
Step 4: Copy the values you need into your code, test data, fixtures, or seed data.
Use case: Create UUIDs for automated tests and fixtures. Generate a batch of sample identifiers instead of typing them by hand.
Use case: Prepare seed data with random identifiers for development databases. One UUID per line makes the values easy to copy into your workflow.
Use case: Add realistic identifiers to mock API payloads or local development examples. Generate up to 100 values in one batch.
Use case: Create sample UUIDs for reproducing bugs or documenting an application workflow. The generator provides ready-to-use version-4 values.
Use case: Generate identifiers while prototyping a feature. This is useful when you need example UUIDs before connecting your application to its usual data source.
Use case: Avoid guessing UUID values by hand. The browser’s crypto.randomUUID method generates the version-4 UUIDs.