urandom.ai · console

Random bytes

Cryptographically secure bytes, hex-encoded.

count (1–4096) Generate

GET /v1/random/bytes?n=

Password

High-entropy password over an unambiguous charset.

length (1–1024) Generate

GET /v1/random/password?length=

Integer & UUID

Unbiased integer in a range, or a v4 UUID.

min

max

Roll integer New UUID

GET /v1/random/int · /v1/random/uuid

Entropy health

Sample bytes and run SP 800-90B health tests.

samples Run tests

GET /v1/entropy/health?samples=

ML-KEM-768 keypair

Post-quantum KEM (FIPS 203). Keys shown truncated.

Generate keypair

POST /v1/pqc/ml-kem-768/keypair

ML-DSA-65 sign & verify

Generate a keypair, sign a message, verify it — end to end.

message Keygen → sign → verify

POST /v1/pqc/ml-dsa-65/{keypair,sign,verify}

Aperiodic ≠ random

The lab demo: a never-repeating sequence that still fails randomness tests.

length Run demo

GET /v1/lab/aperiodic?n=