Security Tools — Free Online Utilities
Security and privacy tools to generate strong passwords, hash files, and encrypt text locally. Sensitive input is processed in your browser and never transmitted.
Generate cryptographically secure passwords with fine-grained control over length, character sets, and quantity.
Encode or decode text using the classic Caesar cipher shift algorithm.
Calculate SHA-1, SHA-256, and SHA-512 hashes of any file entirely in your browser.
Clean HTML and remove XSS / dangerous code
Paste a hash string and identify what algorithm it likely is.
Store and manage passwords locally in your browser — nothing sent to any server.
Measure password strength in bits of entropy and estimate crack times.
Audit a list of passwords for strength, entropy, common patterns, and get detailed security recommendations for each one.
Generate strong, memorable passphrases from a built-in word list with entropy display.
Generate TOTP 2FA codes from a Base32 secret — no app needed.
Encrypt and decrypt text with a password using AES-GCM and WebCrypto — fully client-side.
Encrypt and decrypt text with the Vigenère cipher and explore classical ciphers.