Calculate password entropy in bits to measure password strength against brute-force attacks. Everything runs locally in your browser — nothing is uploaded.
Estimate the time required to brute-force a password given its length, character set, and hash rate. Everything runs locally in your browser — nothing is uploaded.
Generate password hashes using PBKDF2-SHA256 with 600,000 iterations for secure password storage. Everything runs locally in your browser — nothing is uploaded.
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match. Everything runs locally in your browser — nothing is uploaded.
Evaluates password strength using zxcvbn entropy analysis: score, crack time estimate, length, character diversity, dictionary words, and pattern repetition.
Analyzes uploaded resumes against a job description using AI to calculate an ATS compatibility score and provide actionable suggestions. No signup or account required.
Password Entropy Calculator lets you calculate password entropy in bits to measure password strength against brute-force attacks. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Calculate password entropy in bits to measure password strength against brute-force attacks. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Paste or type your content directly into the provided text area.
Yes. After the initial page load, Password Entropy Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Entropy measures password randomness in bits. Higher entropy = harder to crack. It accounts for password length and character set size. 40 bits is weak, 60 bits is moderate, 80+ bits is strong.
Entropy = log2(character_pool_size ^ password_length). For example, an 8-character password using lowercase + uppercase + digits + symbols (95 chars) has log2(95^8) = 52.6 bits of entropy.
The tool estimates how long a brute-force attack would take at various guessing speeds (10/sec, 10K/sec, 1B/sec). This shows the real-world impact of entropy on security.
Balance entropy with memorability. A 16-character passphrase with moderate entropy (Diceware-style) is often more practical than a short high-entropy random string. Use a password manager for truly random passwords.
No. All calculations run locally in your browser. No password or entropy data is sent to any server.
Brute Force Time Estimator
Estimate the time required to brute-force a password given its length, character set, and hash rate. Everything runs locally in your browser — nothing is uploaded.
Two-Factor Auth Generator
Generate TOTP URIs for two-factor authentication setup with authenticator apps. Everything runs locally in your browser — nothing is uploaded.