Is this random number generator truly random?

It uses crypto.getRandomValues() — your browser's cryptographically secure random source, the same API used for generating encryption keys. That is far stronger than the older Math.random() most tools use. It is still a pseudo-random generator seeded by hardware entropy, which is indistinguishable from true randomness for any practical purpose (games, draws, sampling, testing).

Are the minimum and maximum included?

Yes — the range is inclusive on both ends. A range of 1 to 6 behaves exactly like a die: all six values are possible and equally likely.

Can I generate unique numbers without duplicates?

Yes. Enable "No duplicates" and each number in a batch is drawn without replacement, like pulling lottery balls. The quantity is then capped at the size of your range.

Is this suitable for a raffle or giveaway?

Yes. Cryptographic randomness with an inclusive range and optional no-duplicates mode is exactly what a fair draw needs. For transparency, you can screenshot the result together with the visible settings.

Does the tool send my numbers to a server?

No. Everything runs in your browser. No number, range, or draw ever leaves your device — there is nothing to log and nothing to manipulate server-side.

What is the biggest range supported?

Any range that fits in JavaScript safe integers (±9,007,199,254,740,991). For no-duplicate batches the practical limit is 1,000 numbers per draw to keep the page fast.

Back Back to Calculator

🎲

Random Number Generator — Free Online Tool

Cryptographically secure random numbers — any range, with or without duplicates

Free random number generator. Any range, up to 1,000 numbers, unique-draw mode for raffles. Cryptographically secure — fairer than Math.random(). No signup.

Minimum

Maximum

How many

No duplicates

—

Set a range and click Generate

History

📚

Learn more

Key Takeaways

Random Number Generator is a free, browser-based calculator tool — cryptographically secure random numbers — any range, with or without duplicates.
No signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use Random Number Generator

Open the tool: Launch Random Number Generator on Toololis — no account or download needed.
Enter your data: Paste text, enter values, or select a file directly in your browser.
Get instant results: Everything is processed locally — results appear immediately.
Copy or download: Save your output or share it. Bookmark for quick access next time.

Random Number Generator — Quick Facts

Price: Free — no limits, no watermarks, no paywalls
Privacy: Processed in your browser. Tools that need an outside service say so on the page. Page views are counted (Google Analytics).
Platform: Any modern browser on desktop, tablet, or mobile
Category: Calculator Tools on Toololis
Offline: Works offline after first visit (Progressive Web App)

Feature	Details
Tool	Random Number Generator
Category	Calculator
Signup Required	No
File Upload	None — processed in browser
Mobile Support	Fully responsive
Cost	Free forever

Why Use Random Number Generator?

You should try Random Number Generator for a quick, private way to cryptographically secure random numbers — any range, with or without duplicates. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

Random Name Picker

Draw winners from any list — giveaway-fair, thousands of names

Open

Password Generator

Strong, random passwords — generated in your browser

Open

UUID Generator

Generate v4 UUIDs — cryptographically random

Open

🔒

100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.

Key Takeaways

How to Use Random Number Generator

Random Number Generator — Quick Facts

Why Use Random Number Generator?

You might also like

Random Name Picker

Password Generator

UUID Generator