Crypto & Security Tools

This category gathers cryptographic and security utilities developers use to verify, protect and inspect data: hashing with MD5 and the SHA family, generating HMAC signatures, decoding JWTs, hashing passwords with bcrypt, encrypting text with AES, and generating RSA key pairs.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text.

JWT Decoder

Decode and inspect the header and payload of any JWT.

HMAC Generator

Generate HMAC signatures using SHA-256, SHA-1, SHA-384 or SHA-512.

Bcrypt Hash Generator

Hash passwords with bcrypt and verify a password against a hash.

Basic Auth Generator

Generate an HTTP Basic Authentication header from a username and password.

IBAN Validator

Validate an IBAN and see its country and check digits.

Text Encryption

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

RSA Key Pair Generator

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

Luhn / Card Validator

Validate a number with the Luhn algorithm and detect card type.

JWT Encoder

Build a signed JWT (HS256) from a header, payload and secret.

CRC32 Checksum

Compute the CRC32 checksum of text.

ROT13 Encoder / Decoder

Apply the ROT13 letter cipher.

Base64 Text Encoder

Encode text to Base64.

Base64 Text Decoder

Decode Base64 back to text.

Regex Escaper

Escape special characters for regex.

About Crypto & Security tools

Security tools demand trust, which is exactly why every tool in this category runs locally in your browser and never transmits your input. When you hash a value, decode a token, or encrypt a note, the secret stays on your device — there is no server that could log it. Where strong cryptography is involved, the tools use the browser’s built-in Web Crypto API, the same vetted implementation your browser relies on for HTTPS. These utilities are ideal for debugging authentication, verifying checksums, testing webhook signatures, and learning how cryptographic primitives behave. As always, treat anything labelled for testing as exactly that, and keep real secrets out of any tool you do not control.

Other categories

Converters Web Text Generators Reference