Crypto & Security
Create secure hashes and inspect data, right in your browser.
Hash Generator
Create SHA-1, SHA-256, SHA-384, or SHA-512 digests from text.
HMAC Generator
Create keyed SHA-based message authentication codes with Web Crypto.
MD5 Hash Generator
Calculate legacy MD5 digests for non-security checksums and compatibility.
Password Strength Checker
Estimate password entropy and identify common passwords, repeats, and sequences.
CRC32 Checksum
Calculate standard CRC-32 checksums from UTF-8 text in hex or decimal.
AES Text Encryptor
Encrypt and decrypt UTF-8 text with AES-GCM and a PBKDF2-derived key.
Bcrypt Hash Generator
Hash passwords locally with bcrypt, a random salt, and selectable cost.
BIP39 Passphrase Generator
Generate real 12- or 24-word BIP39 mnemonics with an optional passphrase.
RSA Key Pair Generator
Generate RSA signing keys and export PKCS8 private and SPKI public PEM.
Text Encryption
Encrypt and decrypt text with AES, TripleDES, Rabbit, or RC4.
PDF Signature Checker
Inspect PDF AcroForm signature fields, ByteRange values, and available signer metadata.
TOTP Code Generator & Verifier
Generate Base32 secrets, current six-digit TOTP codes, and verify authenticator codes.