Security & Encoding

Hashes, encryption, passwords and keys.

56 tools

Adler-32 Checksum Compute the Adler-32 checksum used by zlib / PNG.
AES Encryptor / Decryptor Encrypt or decrypt text with AES-256-GCM and a passphrase.
Apache htdigest Entry Generate an MD5 entry for an Apache .htdigest file.
Argon2 Hash Generator Generate Argon2id password hashes with configurable parameters.
Base58 Encoder / Decoder Encode and decode Bitcoin-style Base58.
Base62 Encoder / Decoder Encode and decode Base62 (URL-safe alphanumeric).
Base85 / Ascii85 Encoder Encode bytes to Base85 (Ascii85) and decode them back.
basE91 Encoder / Decoder Compact basE91 binary-to-text encoding (~14% denser than Base64).
Bcrypt Hash Generator Hash a password with Bcrypt or verify a hash.
Beaufort Cipher Reciprocal Vigenère variant: encrypt and decrypt are identical.
Bifid Cipher Polybius-based fractionating cipher (5×5 grid).
BIP-39 Mnemonic Generate or verify a BIP-39 seed phrase.
BLAKE2b Hasher Compute BLAKE2b cryptographic hashes (RFC 7693).
CRC-16 / CRC-32 Calculator Compute CRC-16-CCITT and CRC-32 (IEEE 802.3) checksums.
CSP Builder & Linter Build a Content Security Policy from checkboxes or lint an existing CSP for foot-guns.
Diceware Passphrase Generate memorable Diceware passphrases.
HIBP k-Anonymity Prefix Hash a password with SHA-1 and show the 5-char prefix for the HIBP range API.
Hill Cipher (2×2) Matrix-based classical cipher with a 2×2 key matrix mod 26.
HKDF Key Deriver Derive keys from high-entropy material using HKDF.
HMAC Generator Compute keyed HMAC signatures (SHA-1, SHA-256, SHA-384, SHA-512).
JWT Generator Build a signed-token preview from JSON header and payload data.
MD5 Hash Generator Compute the MD5 hash of any text.
Multi-Decoder Pipeline Chain base64, gzip, url and hex transforms in a single pass.
NTLM Hash Generator Compute the NTLM (MD4 over UTF-16LE) hash of a password.
OIDC ID Token Decoder Decode an OpenID Connect ID token and pretty-print its claims.
One-Time Pad Generate or apply a one-time pad — XOR with a random key.
otpauth:// URI Builder Build an otpauth:// URI from issuer, account and Base32 secret.
Password Generator Generate strong, cryptographically-random passwords.
Password Strength Checker Estimate password entropy and strength in real time.
PBKDF2 Key Deriver Derive a key from a password using PBKDF2.
PEM ↔ DER Converter Convert between PEM (base64) and DER (binary/hex) for X.509 and keys.
PGP Encrypt / Decrypt Work with armored PGP-style text payloads in-browser.
PGP Fingerprint Formatter Group a hex PGP fingerprint into the standard 4-/20-char layout.
Playfair Cipher Classic 5×5 digraph substitution cipher.
Polybius Square Cipher Substitute each letter with its row + column digits on a 5×5 grid.
Public Suffix Lookup Find the registrable domain for any hostname using a built-in suffix list.
QR Code Scanner / Decoder Decode QR code images back to text.
Quoted-Printable Encoder / Decoder Encode and decode MIME Quoted-Printable.
ROT13 / Caesar Cipher Encode or decode ROT13 and simple Caesar-shift text.
ROT47 Cipher Reciprocal cipher over the printable ASCII range (33–126).
RSA Key Pair Generator Generate a fresh RSA public + private key pair (PEM).
SAML Assertion Inspector Decode and inspect a SAML 2.0 Response — raw XML, base64, or base64+deflated.
SAML Response Decoder Base64-decode, inflate and pretty-print a SAML request or response.
Self-Signed Certificate Generate a self-signed X.509 RSA certificate (PEM) for dev / staging.
SHA Hash Generator Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.
SHA-3 Hasher Compute SHA3-256, SHA3-384 and SHA3-512 hashes.
Shamir Secret Sharing Split a secret into N shares with a K-of-N threshold.
SSH Key Generator Generate RSA or Ed25519 SSH key material for testing.
SSH Key Inspector Inspect any OpenSSH or PEM key — type, bit length, MD5 + SHA-256 fingerprints.
SSH known_hosts Parser Parse known_hosts entries: host pattern, key type and SHA-256 fingerprint.
SSL Certificate Decoder Paste a PEM-encoded SSL certificate to inspect its fields.
Subresource Integrity Hash Generate a sha256/384/512-prefixed SRI hash for a file or text.
TOTP Code Generator Generate a Time-based One-Time Password (RFC 6238) — SHA-1, SHA-256 or SHA-512.
Trifid Cipher Fractionating cipher over a 3×3×3 cube (26 letters + '+').
UUID to Bytes Converter Convert UUID values to byte-array notation.
XOR Cipher Apply a repeating-key XOR to text or bytes.