AES Key Generator
Generate strong random keys for AES encryption in your code or configuration.
● 🔒 Your data is processed locally in your browser with the Web Crypto API and is never uploaded to our servers.
How it works
Keys come from crypto.subtle.generateKey, backed by your operating system's cryptographic random generator. A 256-bit key has 2256 possible values: guessing it is impossible. The IV (initialization vector) must be unique for every message encrypted with the same key — 12 random bytes for GCM, 16 for CBC and CTR.
Treat the key like a password: store it in a secrets manager or environment variable, never in source code.