Crypto & Security Tools

Free cryptography and security tools — hash text with SHA, MD5 and HMAC, encrypt with AES, generate TOTP two-factor codes, check password strength, and create secure random tokens, all in your browser.

Hash passwords and sign data

MD5 Hash Generator

Compute the 32-character MD5 hash of any text, updating live as you type.

HMAC Generator

Generate an HMAC signature for a message using a secret key and chosen hash.

JWT Generator

Create a signed HS256 JSON Web Token from a JSON payload and a secret.

Bcrypt Hash Generator & Verifier

Generate a bcrypt password hash with a selectable cost factor, or verify a plaintext password against an existing $2b$ hash. Runs fully in your browser.

Argon2 Password Hash Generator & Verifier

Compute an Argon2id/i/d password hash with configurable memory, iterations, and parallelism, or verify a password against a PHC-encoded hash. Client-side.

scrypt KDF Hash Generator & Verifier

Derive an scrypt key from a password with configurable N, r, p cost, or verify a password against a stored scrypt string. Runs fully in your browser.

Encrypt and hide messages

AES Text Encryption

Encrypt and decrypt text with a passphrase using AES-GCM and PBKDF2.

XOR Cipher

XOR-encrypt a message with a repeating key, producing hex output you can decrypt back.

Vigenère Cipher

Encrypt or decrypt text with the classic keyword-based Vigenère cipher.

ROT47 Cipher

Encode or decode text with the self-inverse ROT47 cipher, updating live as you type.

Image Steganography Tool

Hide secret text inside an image using LSB steganography, or reveal a hidden message. Runs 100% in your browser, nothing is uploaded.

Generate keys, tokens and codes

API Token Generator

Generate secure random tokens or API keys in hex, base62 or base64url.

Random Bytes Generator

Generate cryptographically secure random bytes as hex, base64, a decimal array or binary.

RSA / EC Key-Pair Generator (PEM Export)

Generate an RSA or EC key pair in your browser with WebCrypto and export the public and private keys as PEM or JWK. Keys never leave your device.

BIP-39 Mnemonic Seed Phrase Generator & Validator

Generate a valid BIP-39 mnemonic (12–24 words) with correct checksum, or validate a phrase and derive its 512-bit seed. Offline wordlist, no network.

TOTP / 2FA Code

Generate a time-based one-time passcode from a Base32 secret, refreshed every second.

Check passwords, numbers and encodings

Password Strength Meter

Estimate password entropy, a strength rating and a rough crack-time estimate.

Luhn / Card Validator

Check a number with the Luhn algorithm and detect the card brand by prefix.

Base58 Encoder/Decoder

Encode and decode text using the Bitcoin Base58 alphabet, with leading-zero handling.

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