Free Random Number Generator that works offline
Create random integers or fixed-decimal values using the browser cryptographic random source rather than predictable Math.random output. Generate one value or a list for testing and simulations.
What this random number generator does
Cryptographic random bytes provide better unpredictability, although converting them to decimal ranges still produces sampled application values rather than audited lottery results. Bounds and result count are capped to keep use clear and responsive.
How to use the Random Number Generator
- Enter or paste minimum, maximum, count and optional decimal precision into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Generate numbers and review one cryptographically random value per line before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Creating random test fixtures
- Choosing sample positions in a range
- Generating values for classroom probability exercises
- Filling mock numeric fields
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- Do not use this page as a regulated drawing system.
- Integer maximums are included in the possible results.
- Decimal output is rounded to the selected number of places.
Frequently asked questions
Does this tool upload my data?
No. Random Number Generator processes its input in the current browser and does not submit it to a conversion API.
What input does the Random Number Generator accept?
Finite numeric bounds are accepted with up to 1,000 results and 12 decimal places. Integer bounds are treated as inclusive.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.