Every tool in this category is free — runs in your browser, files never leave your device.
Generate strong random passwords with a strength meter and one-click copy
Security ToolsTest password strength offline — entropy, crack-time and pattern warnings
Security ToolsGenerate strong but highly memorable passphrases using standard word dictionaries client-side
Security ToolsGenerate secure, cryptographically random PIN codes client-side
Security ToolsAnalyze and calculate the bit-wise informational entropy strength of passwords client-side
Security ToolsEstimate brute force cracking durations client-side relative to computational guesses per second
Security ToolsEncrypt text client-side using industry-standard AES-GCM encryption with Web Crypto API
Security ToolsDecrypt ciphertexts client-side using industry-standard AES-GCM decryption with Web Crypto API
Security ToolsEncode or decode text client-side using the simple ROT13 caesar-offset cipher
Security ToolsEncode or decode messages client-side using custom Caesar shifts
Security ToolsEncode or decode text client-side using a polyalphabetic Vigenere key cipher
Security ToolsEncode or decode text client-side using the classical Hebrew Atbash reflection cipher
Security ToolsGenerate standard 6-digit two-factor authentication (2FA) tokens client-side from secret keys
Security ToolsGenerate random backup recovery codes client-side to safeguard your accounts
Security ToolsValidate credit card numbers client-side utilizing Luhn's checksum algorithm
Security ToolsGenerate dummy mock credit card numbers client-side for sandbox payment gateway testing
Security ToolsValidate International Bank Account Numbers (IBAN) format client-side
Security ToolsGenerate dummy mock IBAN bank account codes client-side for payment sandbox testing
Security ToolsVerify the validity of a mobile device's International Mobile Equipment Identity (IMEI) client-side
Security ToolsGenerate dummy mock IMEI numbers client-side for software validation and sandbox mobile testing
Security ToolsVerify RFC 5322 email string syntax compliance client-side
Security ToolsGenerate custom privacy policy documents for your websites client-side
Security ToolsGenerate custom terms and conditions documents for your websites client-side
Security ToolsGenerate custom HTML/CSS/JS cookie compliance banners and consent overlays client-side
Security ToolsReview and track your website's compliance with standard GDPR requirements client-side
Security ToolsWrite a note client-side that can only be read once before self-destructing and vanishing completely
Security ToolsGenerate cryptographically secure random salt strings client-side to protect hashed passwords
Security ToolsInteractively check suspicious links for common phishing/scam indicators client-side
Security ToolsTest your Wi-Fi WPA2/WPA3 password strength against dictionary attacks client-side
Security ToolsGenerate non-predictable, highly random 4-digit and 6-digit PIN suggestions client-side
Security Tools