Generate random numbers with mathematical SHA-256 proof. No signup.
A random number generator is the most-used tool for raffles, bingos, official numbered draws, random decisions, and ordering. SorteiGram's difference: every number comes with public SHA-256 cryptographic proof auditable by anyone.
No bias, no manipulation. Uses Web Crypto API — the same tech banks and audited casinos use. Available worldwide, free, no signup.
Define the range (1 to N), choose how many numbers to pick, and click Generate. Numbers come from crypto.getRandomValues with a public SHA-256 hash for auditing.
Yes. Uses Web Crypto API — the cryptographically secure RNG used by banks and audited casinos.
Yes. Without-replacement is default — each number only appears once. Useful for raffles, official draws, ordering.
No technical limit. Works from 1 to 1,000,000.
Publish the SHA-256 hash before drawing. After the draw, the seed is revealed. Anyone can verify mathematically.
Raffles, bingos, random ordering, numbered prize draws, random group decisions.
Auto-loads comments, filters bots, generates PDF certificate.
Pick Instagram winner →