Security & Privacy Tools

Evaluate password security, encrypt text with AES-256, and verify checksums offline.

4 free tools that run directly in your browser. No file uploads, no signup, no watermarks.

Security & Integrity

Password Strength EvaluatorMeasure password entropy, estimated crack time, and structural security.Credit Card / Luhn Algorithm ValidatorCheck identification and card numbers against the Luhn checksum algorithm.

More tools

Cryptographic Password Entropy CheckerCalculate exact mathematical entropy bits and attack complexity for passwords.File Hash Checksum VerifierCalculate SHA-256 and MD5 hash checksums to verify file integrity.

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