Free online security and privacy tools

Converts Manuel de Codage text to Egyptian hieroglyph signs.

Counts letter and n-gram frequencies in a text for code breaking.

Computes the index of coincidence of a text to guess a cipher type.

Encodes and decodes Morse code with options for dot and dash symbols.

Spells out text using NATO phonetic alphabet words and decodes them.

Transliterates between Latin letters and Devanagari Sanskrit script.

Translates text to semaphore flag positions and back.

Encodes and decodes monoalphabetic substitution ciphers and helps break them.

Send a message to a test address to see DKIM, SPF and SpamAssassin results.

Shows fresh high-entropy random strings each page load, ready to copy as passwords or keys.

Gives a temporary inbox address instantly with no sign-up, for receiving sign-up confirmations.

Solves substitution cryptograms using frequency and word patterns.

Form that creates a security.txt file telling researchers how to report vulnerabilities.

Hides or extracts data in images using least-significant-bit steganography and inspects bit planes.

Tests a site's HTTP security headers such as CSP and HSTS and scores them.

Decodes a site's TLS certificate and checks its intermediate certificates.

Runs a deep analysis of a public server's TLS configuration and grades it.

Checks whether your device uses Cloudflare 1.1.1.1 DNS, DNS over HTTPS or TLS, and WARP.

Generates random passwords or memorable word-based ones with length and symbol options.

Shows two-factor authentication codes for a pasted secret key.

Encrypts and decrypts text with AES using selectable mode, key size and IV.

Checks whether your connection exits through Mullvad VPN and shows IP, location and DNS leak status.

Generates bcrypt hashes at a chosen cost and verifies a plain string against an existing hash.

Encodes and decodes ADFGVX ciphers.