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Conversion from decimal numeral system
This calculator converts given decimal value to other positional numeral system
Conversion between any bases
This calculator converts number from one numeral system to another, given both system's bases
Regular expression tester
This online calculator allows user to experiment with regular expressions.
Binary, inverse, and complement codes
Binary, one's complement (inverse) and two's complement codes (calculator was created by user's request)
Conversion of fractional numbers between numeral systems
This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.
Keyboard layout and password
Converts the word, typed in Russian letters into a set of symbols corresponding to these letters in English keyboard layout which is often used to create a Russian-speaking user passwords.
Caesar cipher
Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.
Network address and subnet mask (IPv4)
This online calculator determines subnet parameters for given IP address and subnet mask
Binary Coded Decimal (BCD)
This online calculator converts decimal number to binary code in BCD notation and vice versa
List format
Format a list using regular expressions
Simple math in any numeral system
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
URL-encoded string decoder
This converter decodes URL-encoded string (percent-encoded characters). It converts reserved characters as well as UTF-8 characters
GET request string parser
This parser break GET request string to the parameter-value pairs and decodes URL-encoded sequences if needed
Vigenère cipher
Calculator encrypts entered text by using Vigenère cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.
Symbol frequencies table
This online calculator builds symbol frequency table for a given message
Shannon Entropy
This online calculator computes Shannon entropy for a given event probability table and for a given message
Huffman coding
This online calculator generates Huffman coding based on a set of symbols and their probabilities
Count the number of words
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.
Unique words count
The calculator counts number of unique words in a given text. It also count number of repeated words. It also can remove all the repetitions from the text.
Remove duplicates
The calculator removes duplicates from an element list.
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