Everyday Utilities
6 UtilitiesAudit password strength locally, convert Unix timestamps, compute date differences, calculate percentages, and convert bases. All tools run 100% client-side with zero data transmitted to any external server.
Password Strength Checker
Test password strength, cryptographic entropy bits, and estimated brute-force crack times locally in your browser. Zero data leaves your device.
Timestamp Converter
Convert Unix epoch timestamps (seconds and milliseconds) to human-readable dates, and convert calendar dates back to Unix timestamps.
Date Difference Calculator
Calculate the exact duration between two dates in years, months, days, total hours, minutes, seconds, and working business days.
Percentage Calculator
Solve percentage questions: What is X% of Y, X is what % of Y, percentage increase/decrease, and add/subtract percentages with step-by-step math.
Number Base Converter
Synchronized bidirectional base converter for decimal (base 10), binary (base 2), hex (base 16), and octal (base 8) numbers.
Random Test Data Generator
Generate mock numbers, alphanumeric strings, test names, sample emails, and IP addresses for testing, QA, and UI prototyping.