What is the Random Number Generator?
Pick a random integer between a minimum and maximum using the browser's secure random source.
The tool is part of the Calabi free tools hub — a collection of 99+ browser-based utilities for developers, designers, and content creators. Everything runs client-side: your files and data never leave your device.
How to use the Random Number Generator
- Step 1: Set the minimum and maximum.
- Step 2: Click Generate.
- Step 3: Generate again for another.
The tool updates in real time as you interact with it. No button-clicking required for most tools — results appear instantly.
Example
1–100 → e.g. 42
Privacy & security
The Random Number Generator is designed with privacy as a hard constraint, not an afterthought:
- No upload: Your data is processed in your browser's JavaScript engine. No HTTP request is made to any server while you use the tool.
- No account required: The tool works instantly — no email, no sign-up, no cookie consent wall.
- No logging: Calabi does not log what you paste, upload, or generate. The server only delivers the HTML/JS page — it never sees your content.
- Open to inspection: Open your browser's network inspector while using the tool. You'll see zero outbound requests related to your data.
This architecture is particularly important for the Generators category of tools, where the inputs often contain sensitive or proprietary information.
Frequently asked questions
Is the Random Number Generator free?
Yes, completely free with no account required.
Does it upload my data?
No. The Random Number Generator runs entirely in your browser — your data never leaves your device.
Will it work on mobile?
Yes. The tool works on any modern browser on desktop and mobile.
Can I use this for commercial purposes?
Yes, there are no restrictions on commercial use.
About Generators
The Random Number Generator is part of the Generators category in the Calabi tools hub. Generate a secure random number between any two bounds, in your browser. All tools in this category run entirely in your browser with no server involvement.