UUID Generator
Generate secure RFC 4122 version 4 UUIDs locally.
Your inputs
Your inputs and files stay on your device.
Your result
A little input. A useful answer.
Enter your values and run the tool to see your result here.
How to use this tool
- Set quantity.
- Generate values.
- Copy output.
About UUID Generator
Generate browser-based UUID version 4 values.
Does this tool send my data anywhere?
No. Its calculation or transformation happens on your device.
Using UUID Generator with the right inputs
Generate secure RFC 4122 version 4 UUIDs locally. Start by matching your task to the quantities and options shown below. The definitions of the inputs matter as much as the final number or transformed output; retain the original values so that you can repeat or check the result.
Inputs and options explained
- How many: Enter the numeric value for this quantity using the units or scale shown in the label. The form indicates a minimum of 1 and a maximum of 100.
Checking the result
Begin with a small input whose expected result you can check by inspection or a separate calculation. Apply the selected operation, compare the output with that expectation, and then change one input or option at a time. This helps distinguish a change caused by your settings from a difference in the source data.
Interpretation and limitations
Random output can contain clusters or repeated values unless the selected mode explicitly prevents repetition. An individual draw is not a prediction of the next one. Check the allowed range, requested count and uniqueness settings before using the output.
Should I get the same result when I run it again?
A random generator normally produces a new outcome. Check properties such as count and allowed values rather than expecting a particular sequence.
Before you use the output
- Choose the intended action: Generate UUIDs. Re-run the operation after changing an input or mode so that you are checking the updated result.
- Read the result label and any accompanying explanation. Keep the input values or source file with the output so that a later comparison uses the same assumptions.
- If a result looks unexpected, check units, separators and selected options first. Try a smaller example you can verify rather than repeatedly changing several settings at once.
Questions or a result that needs checking?
If you find a discrepancy, report a problem with UUID Generator. Include a non-sensitive example, the selected options, the result you expected and the result shown. This makes the issue easier to reproduce. See About & privacy for how the site handles tool inputs.