About Ranomio
Ranomio (ranomio.com) was created with a straightforward mission: to deliver the fastest, most reliable, and cryptographically secure suite of random generation utilities on the web.
Blazing Fast
No heavy server reloads or network latency. All utilities execute instantaneously within your local browser context.
Cryptographic Entropy
Powered by the Web Crypto API for non-deterministic random numbers, passwords, and dice rolls.
100% Client-Side
Your custom lists, passwords, participant names, and seeds never touch an external server.
360° Cryptographic Audit & Tamper-Proof Fairness
How Ranomio delivers mathematical transparency and anti-fraud guarantees for creators, educators, and enterprise contests.
Hardware Entropy (CSPRNG)
Zero reliance on predictable Math.random(). We utilize the native Web Crypto API powered by OS-level hardware entropy.
Provably Fair Protocol
Pre-committed SHA-256 secret seed hashes prevent any on-the-fly result manipulation during animations.
Roster Checksum Fingerprint
Computes a canonical SHA-256 digest of all participating candidates, proving no names were quietly added or removed.
Anti-Counterfeit Guilloche & GPU Badges
Shareable PNG cards (1080x1080) rendered with unique stochastic wave patterns and GPU rasterized elements immune to F12 edits.
Portable JSON Reports & Offline CLI
Download standardized .json audit certificates and run independent verification scripts in Python 3, Node.js, or Bash.
Entropy Lab & Chi-Square (χ²) Uniformity Test
NIST SP 800-22Audit the statistical uniformity and unbiased randomness of the Web Crypto CSPRNG engine in real time.
How does the Chi-Square test prove true randomness?
In a mathematically fair generator, every number has an identical probability of occurring (continuous uniform distribution). The Chi-Square test (χ²) compares empirical sample distributions against the ideal theoretical model. A p-value ≥ 0.001 formally certifies that the generator has zero algorithmic bias, clustering, or favoritism.
Audit a Draw Certificate Right Now
Upload an image card, paste a verification link, or drop a JSON report to verify authenticity in real time.
Advanced Productivity & Printing Features
Ranomio is engineered for fast workflows, live events, classrooms, and corporate raffles.
Keyboard Shortcuts
Press Space to draw, M to mute sound, F for fullscreen, and ? for the complete guide.
A4 Diagrammed Printing
Generate professional 75 or 90 ball Bingo cards and team rosters ready for direct printing on A4 paper without clipping margins.
CSV / Excel Export
Export split group rosters, lottery games, and bingo draw histories directly in Excel and Google Sheets compatible formats.
Our Philosophy: Privacy by Design
Most traditional web tools send your queries to a remote server database, collecting logs and tracking behavioral history. At Ranomio, we believe user privacy is non-negotiable. By leveraging the browser's native window.crypto.getRandomValues API, our applications produce high-grade statistical entropy without sending any user data over the wire.
Whether generating random passwords for bank accounts or dividing confidential employee rosters into project teams, everything happens strictly in temporary volatile memory on your own computer or phone.
Engineered with Modern Web Standards
Ranomio is crafted with React, Next.js, and TypeScript, engineered for ultra-fast load times, responsive mobile rendering, and accessible interaction patterns. We prioritize smooth animations, intuitive navigation, audio feedback, and clean multilingual localization.
Free & Open to the World
All tools on Ranomio are provided 100% free of charge to educators, developers, students, gamers, and teams globally. We support multiple languages including English, Portuguese, Spanish, French, and German.