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Security
17AES Text EncryptorEncrypt or decrypt text with AES-GCM and a password using Web Crypto.CORS Header BuilderCompose explicit CORS response headers for browser APIs and preflight requests.CSP Header BuilderBuild a readable Content-Security-Policy header from directive fields.Hash Comparison ToolCompare two strings with a browser cryptographic digest.HMAC GeneratorCreate or verify HMAC signatures with SHA-256, SHA-384, or SHA-512 locally.Password GeneratorCreate strong, customizable passwords with secure randomness from your browser.Password Strength CheckerCheck password length and character variety locally without storing the value.PBKDF2 Password DerivationDerive a 256-bit key from a password and salt using browser Web Crypto.PEM Certificate InspectorInspect PEM block type, decoded size, and a local SHA-256 fingerprint.PKCE GeneratorGenerate an OAuth PKCE verifier and S256 challenge locally.QR Code GeneratorCreate a downloadable QR code from text or a URL entirely in your browser.RSA Key Pair GeneratorGenerate an RSA-OAEP 2048-bit public and private key pair locally.Secret ScannerFind likely credentials and private keys in pasted code before sharing or committing it.Secure Random String GeneratorGenerate random strings using the browser Web Crypto API.SRI Hash GeneratorGenerate Subresource Integrity values for pasted scripts and styles with Web Crypto.SSH Key Fingerprint CalculatorCalculate an OpenSSH public-key SHA-256 fingerprint locally.TOTP GeneratorGenerate six-digit authenticator codes from a Base32 secret or otpauth URI.