Random Number Generator
Generate truly random numbers within any range you choose. Pick a minimum and maximum, how many numbers you need (up to 10,000), and the number of decimal places, then optionally require all values to be unique or sort them ascending. Perfect for raffles, sampling, test data, and games. Numbers are produced with your browser’s cryptographically secure generator using bias-free rejection sampling.
How to Use Random Number Generator Online (Free & Client-Side)
Random Number Generator runs 100% locally in your web browser. Follow these 3 simple steps to process your files or data in seconds without uploading to external servers.
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Step 1: Input Data or File
Drop your file, paste text, or set parameters into the Random Number Generator interface above. Files are read directly from local memory.
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Step 2: Instant Local Execution
Hardware-accelerated WebAssembly processes your input instantly with zero network delay and zero server queue waiting.
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Step 3: Export & Download
Instantly download or copy your processed result. No watermarks, no registration, and no file size paywalls.
Zevylo vs Legacy Online Tools Comparison
See why privacy-conscious professionals choose Zevylo over legacy cloud-upload sites:
| Comparison Factor | Zevylo (Random Number Generator) | Legacy Competitors (Ezgif, iLovePDF, CloudConvert) |
|---|---|---|
| Data Storage & Privacy | 100% In-Browser (0 bytes uploaded) | Transferred to external cloud servers |
| Processing Speed | Instant (No network upload wait) | Throttled by internet upload speeds |
| File Size Limits | Unlimited (Device RAM capacity) | Capped (often 25MB - 100MB max) |
| Cost & Paywalls | 100% Free & Unlimited | Daily quotas, wait timers, or paid subscriptions |
| Ad Clutter & CLS | Zero disruptive banner popups (CLS = 0) | 5-8 intrusive ads, video overlays & layout shifts |
| International Accessibility | Worldwide multi-language support (12 languages) | Limited language options or paid localization |
Learn the Working Mechanisms & RFC Web Standards Behind Random Number Generator
Read our dedicated technical article covering algorithms, browser privacy, specifications, and advanced workflows.
Frequently Asked Questions
QIs this random number generator secure?
Yes. It uses crypto.getRandomValues (your browser’s cryptographically secure RNG) with rejection sampling, so the numbers are unbiased and not predictable like Math.random.
QCan I generate unique numbers with no repeats?
Yes. Enable "No duplicates" to guarantee every generated integer is unique — ideal for raffles and lotteries. The count must fit within the chosen range.
QCan it generate decimals?
Yes. Set "Decimal places" to 1 or more to generate random decimal numbers instead of whole integers.
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