Random.org Alternative: Free, No Ads, Secure
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Random.org has been the default "real random" site since the 1990s. It uses atmospheric noise from radio receivers as its entropy source, which is genuinely cool. It is also free for small uses, ad-supported, and pushes premium subscriptions for larger volumes. For most people, a browser-based cryptographic random number generator does the job without ads or upsells.
free random number generator runs in your browser with the same cryptographic random source used for password and TLS generation. No ads, no premium tier, no quotas.
Random.org vs Browser Crypto Random
Random.org's selling point is "true randomness from atmospheric noise." That is real — they have actual radio receivers picking up real noise. But for almost every practical use, browser cryptographic random is statistically indistinguishable from atmospheric noise.
The browser's crypto.getRandomValues uses entropy from your operating system (mouse movement, keyboard timing, hardware RNG, network jitter). It is the same source used to generate TLS session keys and password hashes — secure enough for banks, more than secure enough for picking lottery numbers or raffle winners.
The practical difference between atmospheric noise and OS entropy: zero, for any consumer use case.
When You Actually Need Random.org
Random.org's atmospheric noise source matters for:
- Academic research where you must cite a "true random" source for statistical defensibility
- Public lotteries that publish auditable randomness from a third party
- Cryptographic key generation that requires demonstrably non-deterministic entropy
For all other uses — picking winners, generating IDs, choosing options, classroom activities, lottery quick picks — browser crypto random is the right answer. Faster, free, no API limits, no ads.
Sell Custom Apparel — We Handle Printing & Free ShippingFeature Comparison
| Feature | Random.org Free | Browser RNG (this tool) |
|---|---|---|
| Cost | Free with limits | Free, no limits |
| Ads | Yes | No (other than the small "support our other tools" link) |
| API quota | Yes (200,000 bits/day free) | No quota |
| Account required | Free tier no, premium yes | No |
| Privacy | Logs IP and request | Nothing leaves your browser |
| Source | Atmospheric noise | OS entropy + crypto.getRandomValues |
| Speed | Server roundtrip | Instant (local) |
For 99% of uses, the browser tool wins on every dimension that matters in daily use.
Privacy Comparison
Random.org logs every API request including IP address, range, count, and timestamp. They publish a privacy policy describing how they retain and use the data. Free tier users are subject to ad tracking on the site itself.
our random number generator sends nothing to any server. Your range, your count, the result — all stay in your browser. Close the tab and no record exists anywhere. For lottery picks, raffle winners, and personal decisions, that is the right privacy model.
Generate Random Numbers Now
Set your range, pick how many, optionally avoid duplicates. Cryptographically secure, runs in your browser, nothing logged.
Open Random Number GeneratorFrequently Asked Questions
Is browser random as good as Random.org?
Statistically yes. The browser uses cryptographic random from OS entropy, which is indistinguishable from atmospheric noise for any consumer use case.
Why is Random.org famous?
It was the first widely available "true random" web service, using radio receivers to capture atmospheric noise. The technique is cool but no longer necessary for most uses.
Is Random.org free?
Free for small use (about 200,000 bits per day). Larger volume requires a paid plan.