RANDOM ORG
True random number generator, dice rolls, password generator, and more.
Open the official app on www.random.org
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Use it free
Open the official tool or demo — no account needed.
Self-host it
Run the open-source version on your own infrastructure.
What is RANDOM ORG?
RANDOM.ORG is a true random number generation service designed to provide unpredictable, statistically sound randomness for diverse applications. It addresses the need for secure, unbiased random data in scenarios where pseudo-random number generators (PRNGs) may fall short. The service is used by developers, artists, researchers, and casual users who require randomization for games, security protocols, simulations, and creative projects. By leveraging atmospheric noise and quantum phenomena, it solves the problem of generating reliable randomness without relying on computational algorithms that could introduce predictability or bias.
How it works
RANDOM.ORG is a web-based tool that generates random numbers using entropy sources such as atmospheric noise and quantum fluctuations. Its primary purpose is to deliver cryptographically secure, unbiased randomness for applications requiring high levels of unpredictability. The service caters to users needing randomization for lotteries, cryptographic key generation, statistical sampling, and creative tasks. It prioritizes transparency by disclosing its entropy sources and statistical validation methods. The platform offers tools for generating integers, decimal fractions, Gaussian distributions, and hexadecimal color codes. It supports advanced features like password generation, geographic coordinate randomization, and audio noise output. Users can customize parameters such as range, quantity, and output format.
How to use it
- 1Navigate to the RANDOM.ORG website and select a tool (e.g., 'Dice Roller' or 'Password Generator'). 2. Configure parameters such as number range, quantity, or output format. 3. Click 'Generate' to produce random data. 4. Download or copy the results for immediate use. Practical tips: Verify JavaScript support in your browser, as it is required for interactive features. For API users, consult the documented endpoints for programmatic access.
What it can do
- Password Management
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/random-org
- license: Open source
- privacy: Opens an external demo
Limitations
- Dependence on browser JavaScript support for core functionality
- Potential loading errors in the GitHub repository interface
- Limited control over entropy source specifics for end-users
- No built-in encryption for generated data transmission
- API rate limits for automated clients
Understanding the result
True random number generator, dice rolls, password generator, and more.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by random-org (MIT).
- Built with
- random-org (https://github.com/random-org)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Text
- Output
- Output
Built with https://github.com/random-org. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- random-org
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- /random-org — GitHub Repository
Upstream project · GitHub
Frequently asked
How does RANDOM.ORG ensure true randomness?
RANDOM.ORG uses atmospheric noise collected from global sensors and quantum phenomena as entropy sources. These physical processes are inherently unpredictable, unlike pseudo-random number generators that rely on mathematical algorithms. The service validates its outputs through statistical tests to ensure uniformity and lack of patterns.
Can I use RANDOM.ORG for cryptographic purposes?
Yes, but with caution. While the service provides cryptographically secure random numbers, users must implement additional encryption for sensitive data. The service's entropy sources meet cryptographic standards, but generated data should never be used as the sole security mechanism without proper encryption protocols.
How do I generate a random password?
Navigate to the 'Password Generator' tool, specify the desired length (e.g., 12 characters), select character types (uppercase, lowercase, numbers, symbols), and click 'Generate'. The tool will produce a password combining these elements, which you can copy and use immediately.
How does RANDOM.ORG compare to UUID or crypto libraries?
Unlike UUIDs, which use deterministic algorithms, RANDOM.ORG leverages physical entropy sources for true randomness. Compared to cryptographic libraries like OpenSSL, it provides a user-friendly interface for non-technical users but lacks the advanced cryptographic features and customization options available in specialized libraries.
What should I do if the website isn't loading?
Check your browser's JavaScript settings to ensure they are enabled, as RANDOM.ORG requires this for interactive features. Clear your browser cache and cookies, then reload the page. If issues persist, try a different browser or consult the 'Troubleshooting' section in the documentation.