Health
Calculate ovulation date and fertile window based on menstrual cycle
ovulation-calculatorSecurity
Generate secure random passwords
password-generatorGames
Draw random playing cards from a standard deck
random-cardGenerator
Generate random strings with customizable character sets, length, and patterns
random-string-generatorFormat Conversion
Encrypt and decrypt text using RC4 stream cipher with a key
rc4-encryptorFormat Conversion
Encode and decode text using ROT13 substitution cipher (rotates letters by 13 positions)
rot13-cipherFormat Conversion
Encode and decode text using ROT47 cipher (rotates all printable ASCII characters by 47 positions)
rot47-cipherMath & Numbers
Advanced scientific calculator with support for complex mathematical functions and expressions
scientific-calculatorCryptography
Generate Scrypt hash from password
scrypt-generatorCryptography
Validate password against Scrypt derived key
scrypt-validatorMath & Numbers
Calculate statistical measures for numerical datasets including mean, median, mode, standard deviation, and more
statistics-calculatorGames
Generate random Sudoku puzzles with customizable difficulty
sudoku-generator