Processing and privacy
Processing varies by tool. Check the instructions for local processing, server requests, external services and any file or request limits before entering sensitive information.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the UUID Generator
Generate random version 4 UUIDs in bulk.
- 1 Enter a quantity from 1 to 1,000 under How many?
- 2 Choose uppercase, hyphens and optional braces to match the format expected by your application. Changing an option generates a new list.
- 3 Click Generate for another batch or Copy all to copy the current IDs, one per line.
Example and practical tips
A standard UUID has five groups of hexadecimal characters separated by hyphens. Leave Hyphens enabled for systems expecting that standard representation; remove them only when the receiving system accepts compact IDs.
Frequently asked questions
Which UUID version does this generate?
This tool generates random version 4 UUIDs using the browser’s crypto.randomUUID function. It does not generate time-ordered UUID versions.
Does changing the format keep the same IDs?
No. Quantity and formatting changes regenerate the entire list. Copy any IDs you need to keep before changing those controls.
Why might generation fail on a local site?
The tool depends on the browser crypto.randomUUID API, which requires a supported browser and a secure context. Use HTTPS for the deployed website.
Practical guides
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How to Use UUID Generator
Generate random UUID v4 identifiers in your browser. Create up to 1,000 IDs, choose uppercase, hyphens or braces, and copy the full list.
Report an issue
Something broken or not quite right? Tell us and we will look into it.