Security & Hash Tools

The Security category on ToolNestr provides essential tools for protecting your digital privacy, creating strong credentials, and understanding your online security posture. In an age where data breaches and identity theft are increasingly common, these tools help you take proactive steps to safeguard your accounts and personal information. The password strength tester evaluates any password you provide and gives it a score based on length, character diversity, pattern avoidance, and resistance to common attack methods. The password entropy calculator shows strength in bits of entropy and estimates crack time at modern GPU speeds. The hash generators produce cryptographic hashes using MD5, SHA-256, HMAC, and CRC32 algorithms, which are useful for verifying data integrity and testing checksum verification. The AES-256 encryption and decryption tool secures text messages with a passphrase using

the industry-standard symmetric cipher. The RSA key generator produces 2048-bit public/private key pairs in PEM or JWK format entirely in your browser. The bcrypt hash checker generates bcrypt hashes and verifies plaintext against existing hashes for password storage testing. The UUID/GUID generator creates v4 universally unique identifiers, one or many at a time. The random token generator produces cryptographically secure tokens with custom length and character sets. The CSR decoder parses Certificate Signing Request PEM files to inspect subject, key type, and extensions. The X.509 certificate decoder reads SSL/TLS certificate details including issuer, validity dates, and subject alternative names. The PIN code strength checker evaluates numeric PINs against common patterns and brute-force resistance. The QR code generator creates QR codes from any URL or text and downloads as PNG. All

security tools are designed with privacy as the core principle. They run locally in your browser, and any data you input for hashing, encryption, or analysis is processed on your device and never transmitted to any server.