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Math & Data
Random Number Generator
Generate random numbers within a custom range.
What this page is for
Fast browser workflow
Use this tool without registration, downloads, or page clutter.
Consistent workspace
Supported dynamic tools now run in a real interface instead of a fake loading panel.
Private by default
Ideal for quick inspection, transformation, and test data generation alongside temporary email workflows.
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Workspace
Run the tool here
Output
Run the workspace to see the response here.
How to use
- Set the minimum and maximum.
- Choose how many numbers you need.
- Generate and copy the list.
About this tool
Generate random integers or decimals within a range, with optional uniqueness and count.
Random Number Generator is part of the TmpMailer Math & Data set — free browser utilities that open instantly, need no account, and pair well with a temporary-email workflow when you just need a quick result.
Common use cases
- Picking a winner for a giveaway.
- Creating test IDs.
- Sampling values for a simulation.
Common questions
Are the numbers cryptographically secure?
They come from the browser's random source, which is suitable for games and tests but not for keys or tokens. Use a crypto API for security.
Can numbers repeat?
Yes unless you enable unique values. Unique mode needs a range at least as large as the count.
Are the bounds inclusive?
Both the minimum and maximum are included.
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