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Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Caesar, ROT13, Atbash, and Vigenère transforms plus letter-frequency analysis for CTF and puzzle solving.
Decode a PKCS#10 Certificate Signing Request (CSR) to verify its subject, public-key algorithm, and signature before you submit it to a CA.
Shannon entropy and character-class analysis for a secret.
Compute MD5, SHA-1, SHA-256, and SHA-512 digests of any text in one pass, entirely in your browser.
Identify likely hash algorithms from a digest by its length, character set, and prefix format.
Generate keyed HMAC signatures (HMAC-SHA1, HMAC-SHA256, HMAC-SHA512) for API signing and webhook verification.