The calculators encode string to base64 string and decode back to original string. Special characters (+/) , generally produced by base64 algorithm, can be replaced by the data provided in additional parameter.
This online calculator converts decimal number to binary code in BCD notation and vice versa
Binary, one's complement (inverse) and two's complement codes (calculator was created by user's request)
Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.
This calculator converts number from one numeral system to another, given both system's bases
This calculator converts given decimal value to other positional numeral system
This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.
The calculator counts word number in a given text. It can be used for rough calculation of translation cost. Can be used for word number calculation in software resources.
This online calculator parses emails from block of text using regular expression
This parser break GET request string to the parameter-value pairs and decodes URL-encoded sequences, if needed
This calculator uses Hill cipher to encrypt/decrypt a block of text
This online calculator generates Huffman encoding for given frequency of occurrence of symbols.
Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.
The calculator checks LL1 grammar correctness, parses a text using the grammar, shows FIRST, FOLLOW and FIRST PLUS sets, parsing tree and gives PLANETCALC parsing code.
This online calculator allows user to experiment with regular expressions.
This online calculator computes Shannon entropy for a given event probability table and for a given message
This online calculator supports simple math (addition, subtraction, division, multiplication and power) for numbers expressed in any numeral system - binary, octal, hexadecimal, from the base 2 to base 36
This online calculator builds symbol frequency table for a given message