“crypto”

Ad-free converter for fiat currencies and cryptocurrencies that works offline as a PWA.

Crypto gain and loss tax calculator for trade histories.

Drag-and-drop recipe builder that chains hundreds of operations for encoding, encryption, compression and data analysis.

Creates passwords on the device with the Web Crypto API, with an easy-type mode and a maximum-security mode.

Estimates Mexican income tax on cryptocurrency gains.

Generates short, memorable passwords in the browser.

Chains encoders, decoders and ciphers in a modular pipeline, with conversions running in the browser.

End-to-end encrypted office suite with rich text, spreadsheets and polls, usable without an account.

Creates self-destructing encrypted notes and files that can be viewed a limited number of times.

Encrypts a message with a passphrase using browser crypto and produces a link that only decrypts with that passphrase.

Encodes, decodes and brute-forces Caesar shift ciphers.

Generates random bytes or numbers from the browser's crypto source.

Computes an HMAC-SHA256 signature for a message and secret key in the browser.

Generates RSA key pairs of selectable bit length for download or copying.

Step-by-step animated walk through of how SHA-256 hashes a message, with a live input box.

Generates and checks HMAC-SHA256/384/512 signatures using Web Crypto.

Creates a BIP39 mnemonic and passphrase pair from random entropy, or converts between mnemonic and passphrase.

Computes an HMAC from a message and secret key using a selectable hash function.

Generates a new random RSA public and private key pair in PEM format.

Applies the Atbash cipher to text with explanation.

Enigma machine simulator with explanations of each wiring step.

Encodes and decodes ROT13 text.

Encrypts and decrypts Vigenere and variants with explanations.