justyourcalculatorPassword Generator
Strong, random passwords made in your browser and never sent anywhere.
- 100% Free
- Instant Results
- No Sign Up
Password Generator
Strong random passwords, made on your device
More Other Calculators
View all calculators- Random Number GeneratorRandom integers or decimals in any range
- Base64 Encode DecodeEncode text or files to Base64 and decode it back
- Dice RollerRoll d4, d6, d8, d10, d12, d20 or d100 dice
- URL Encode DecodePercent-encode text for URLs and decode it back
- Age CalculatorExact age in years, months, days and more
- Date CalculatorDays between dates, or add and subtract days
- Time CalculatorAdd or subtract days, hours, minutes, seconds
- Hours CalculatorHours and minutes between two times
- GPA CalculatorSemester and cumulative GPA on a 4.0 scale
- Calculators
- 204+
- Free to use
- 100%
- Results as you type
- Instant
How the password generator calculator works
Passwords are built with your browser's cryptographic random number generator (crypto.getRandomValues), the same source used for encryption keys. Nothing is sent to a server or stored.
Strength is estimated as entropy: length × log2(size of the character pool). Each extra bit doubles the guesses an attacker needs. 16 characters from letters, numbers and symbols gives about 105 bits, far beyond brute force.
At least one character from every set you tick is included, and characters are drawn without bias (random values that would favor some characters are thrown away and redrawn).
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
Share links may contain your input values. Anyone with the URL can read them; avoid sharing sensitive personal or financial information.