Fydler UtilityBelt - Password Strength Analyzer

Password Strength Analyzer

Security & Authentication Tool

Enter Password

Password Strength Tips

Use at least 12 characters — longer passwords are exponentially stronger.
Mix uppercase and lowercase letters.
Include numbers and symbols.
Avoid common words, names, dates, and keyboard patterns (e.g. "password123", "qwerty").
Use a password manager to generate and store strong unique passwords.

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lucide.createIcons(); const input = document.getElementById('ps-input'); function analyzePassword(pwd) { const len = pwd.length; let hasLower = /[a-z]/.test(pwd); let hasUpper = /[A-Z]/.test(pwd); let hasDigit = /[0-9]/.test(pwd); let hasSymbol = /[^a-zA-Z0-9]/.test(pwd); let types = [hasLower, hasUpper, hasDigit, hasSymbol].filter(Boolean).length; let entropy = 0; let pool = 0; if (hasLower) pool += 26; if (hasUpper) pool += 26; if (hasDigit) pool += 10; if (hasSymbol) pool += 32; if (pool > 0) entropy = Math.round(len * Math.log2(pool)); let score = 0; if (len >= 8) score += 20; if (len >= 12) score += 15; if (len >= 16) score += 15; if (hasLower && hasUpper) score += 10; if (hasDigit) score += 10; if (hasSymbol) score += 15; if (types >= 3) score += 15; let strength, color; if (score >= 80) { strength = 'Very Strong'; color = '#22c55e'; } else if (score >= 60) { strength = 'Strong'; color = '#84cc16'; } else if (score >= 40) { strength = 'Moderate'; color = '#eab308'; } else if (score >= 20) { strength = 'Weak'; color = '#f97316'; } else { strength = 'Very Weak'; color = '#ef4444'; } return { len, hasLower, hasUpper, hasDigit, hasSymbol, types, entropy, score, strength, color }; } function update() { const pwd = input.value; if (!pwd) { document.getElementById('ps-score').style.width = '0%'; document.getElementById('ps-label').textContent = ''; document.getElementById('ps-details').innerHTML = ''; return; } const r = analyzePassword(pwd); document.getElementById('ps-score').style.width = Math.min(r.score, 100) + '%'; document.getElementById('ps-score').style.backgroundColor = r.color; document.getElementById('ps-label').textContent = r.strength + ' (' + r.score + '/100)'; let details = `

`; details += `

Length: ${r.len} chars

`; details += `

Entropy: ${r.entropy} bits

`; details += `

${r.hasLower ? '✔' : '✘'} Lowercase

`; details += `

${r.hasUpper ? '✔' : '✘'} Uppercase

`; details += `

${r.hasDigit ? '✔' : '✘'} Digits

`; details += `

${r.hasSymbol ? '✔' : '✘'} Symbols

`; details += `

`; document.getElementById('ps-details').innerHTML = details; } input.addEventListener('input', update); function showToast(msg) { const toast = document.getElementById('toast'); const toastMsg = document.getElementById('toast-message'); toastMsg.textContent = msg; toast.classList.add('show'); setTimeout(() => toast.classList.remove('show'), 2000); }