Cipher Decipher

Tool directory

Every utility follows the same layout: large inputs, monospace outputs, and instant updates. Filter by category or start from the homepage search.

Filter:All Classical Ciphers Encoding & Decoding Communication Codes Puzzle Tools Security & Hashing Steganography Number Theory

Showing Number Theory (6 tools)

GCD/LCM Calculator

Calculate greatest common divisor and least common multiple for number theory and mathematical problems.

Modular Arithmetic Calculator

Compute modulo operations, modular inverses, and modular exponentiation for cryptography and mathematics.

Prime Factorization

Find prime factors of any integer with detailed breakdown and mathematical properties.

Extended Euclidean Algorithm

Solve Bézout's identity and find modular inverses using the extended Euclidean algorithm.

Chinese Remainder Theorem Solver

Solve systems of simultaneous linear congruences using the Chinese Remainder Theorem.

Perform bitwise XOR operations on multiple numbers with binary and hexadecimal representations.