Security & Cryptography

Generate hashes, passwords, tokens and work with JWTs and ciphers.

Featured toolSecurity & Cryptography

Generate MD5, SHA-1, SHA-2 and SHA-3 hashes from any text.

Featured toolSecurity & Cryptography

Password Hash Generator

Hash passwords with Argon2id, bcrypt or scrypt using a salt.

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Decode a JSON Web Token to inspect its header and payload.

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Encrypt and decrypt text with a password using AES-256-GCM.

Featured toolSecurity & Cryptography

Password Strength Checker

Check password strength with entropy and estimated crack time.

Featured toolSecurity & Cryptography

Passphrase Generator

Generate memorable, secure passphrases from random words.

Featured toolSecurity & Cryptography

RSA Key Pair Generator

Generate an RSA public and private key pair in PEM format.

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Bcrypt Verifier

Check whether a password matches a bcrypt hash.

Security & Cryptography

Create a signed JSON Web Token with HMAC (HS256/384/512).

Security & Cryptography

Generate an HMAC signature from a message and secret key.

Security & Cryptography

Base32 Encoder & Decoder

Encode text to Base32 and decode Base32 back to text.

Security & Cryptography

TOTP 2FA Code Generator

Generate time-based one-time passcodes from a Base32 secret.

Security & Cryptography

Base58 Encoder & Decoder

Encode text to Base58 and decode Base58 back to text.

Security & Cryptography

Vigenere Cipher

Encode and decode text with a keyword-based Vigenere cipher.

Security & Cryptography

Hash Identifier

Identify the likely type of a hash from its format.

Security & Cryptography

Verify a JWT's HMAC signature and check its claims.

Security & Cryptography

File Hash Checker

Compute MD5, SHA-1, SHA-256 and SHA-512 checksums of a file.

Security & Cryptography

ECDSA Key Pair Generator

Generate an ECDSA public and private key pair in PEM format.

Security & Cryptography

Encryption Key Generator

Generate a random AES key in hex and Base64.

Security & Cryptography

Random Bytes Generator

Generate secure random bytes in hex, Base64 or decimal.

Security & Cryptography

URL-Safe Base64 Encoder & Decoder

Encode and decode Base64URL, the URL-safe Base64 variant.

Security & Cryptography

UUID v5 Generator

Generate a deterministic namespace UUID (version 5).

Security & Cryptography

Encode and decode text with the Atbash substitution cipher.

Security & Cryptography

ROT47 Encoder & Decoder

Encode and decode text with the ROT47 cipher.

Security & Cryptography

Rail Fence Cipher

Encode and decode text with the rail fence transposition cipher.

Security & Cryptography

Encrypt and decrypt text with a repeating-key XOR cipher.

Security & Cryptography

NTLM Hash Generator

Generate the NTLM hash of a password.

Security & Cryptography

CRC32 Checksum Calculator

Compute the CRC32 checksum of text.

Security & Cryptography

Htpasswd Generator

Generate Apache .htpasswd entries with bcrypt or SHA-1.

Security & Cryptography

Ed25519 Key Pair Generator

Generate a modern Ed25519 public and private key pair in PEM.

Security & Cryptography

Check whether an HMAC signature matches a message and secret.

Security & Cryptography

Ascii85 Encoder & Decoder

Encode text to Ascii85 (Base85) and decode it back.

Security & Cryptography

PGP Key Generator

Generate a PGP/OpenPGP public and private key pair.

Security & Cryptography

PGP Encrypt & Decrypt

Encrypt a message with a PGP public key and decrypt with a private key.

Security & Cryptography

X.509 Certificate Decoder

Decode a PEM SSL/TLS certificate to inspect its details.

Security & Cryptography

Generate a certificate signing request and private key.

Security & Cryptography

Shamir's Secret Sharing

Split a secret into shares and recombine them to recover it.

Security & Cryptography

Caesar Cipher (ROT13)

Encode or decode text with a Caesar shift cipher, including the popular ROT13.

Security & Cryptography

Data Masking Tool

Mask generic text, email addresses, phone numbers or payment-card digits for safer examples and logs.

Security & Cryptography

Credit Card Validator

Check payment-card length, likely brand and Luhn checksum without storing or transmitting the number.

Security & Cryptography

Inspect PEM certificate-signing-request DER metadata, algorithms, object identifiers and subject strings.

Security & Cryptography

Email Header Analyzer

Explain email routes, reported SPF/DKIM/DMARC results and common phishing signals locally.

Security & Cryptography

Metadata Privacy Cleaner

Inspect and remove common private metadata from images and PDFs entirely in your browser.

Security & Cryptography

CAPTCHA Generator

Generate a lightweight CAPTCHA-style SVG and answer for server-side integration testing.

About Security & Cryptography

These security and cryptography tools help you generate and inspect the building blocks of secure software: hashes, strong passwords, API tokens, password hashes and JSON Web Tokens.

Create MD5 and SHA hashes, generate random passwords and secrets, hash passwords with Argon2, bcrypt or scrypt, decode and sign JWTs, and experiment with classic ciphers, all in one place.

Everything runs entirely in your browser using your device's secure random generator, so passwords, secrets and tokens are never sent to a server.