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.
Set a range and click Generate
📚 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 — your data stays on your device.
- 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
- 100% browser-based — no data is sent to any server
- 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. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.
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.