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• CSV table to JSON array

  This online calculator converts CSV table to JSON array of objects, using given map of CSV columns to object properties.

• Extract domain names from URLs and count unique names

  This calculator extracts domain names from URLs and counts unique names

• Gravity Falls Bill's symbol substitution cipher decoder

  This online calculator can decode messages written with Bill's symbol substitution cipher

• Isogram checker

  This online calculator can check if a word/phrase is an isogram.

• Lines filter by number

  This online calculator filters lines of text by removing designated lines or, you can say, leaving only designated lines

• List reverser

  This online calculator reverses lines of text

• Numbered list maker

  This online calculator numbers lines of text

• Pangram checker

  This online calculator can check if a phrase is a pangram.

• PATHFINDER cipher checker

  This online calculator decrypts digits encrypted by PATHFINDER type of cipher.

• Rail fence cipher

  This article contains two calculators, first can be used to encode message with the rail fence cipher, second can be used to crack message encoded with the rail fence cipher by brute force. Decoded simply outputs decoded message for different number of "rails".

• Random Letters Generator

  This online generator just generates specified number of symbols, randomly selecting them from given set of symbols

• Repeated Word Heatmap

  This calculator can help avoid unwanted word repetition in prose. It counts the number of occurrences of each word in the document, both globally, and within the "sliding window" distance before and after each word. It highlights the words which are used frequently near each other..

• Repeated Word Heatmap

  This calculator can help avoid unwanted word repetition in prose. It counts the number of occurrences of each word in the document, both globally, and within the "sliding window" distance before and after each word. It highlights the words which are used frequently near each other..

• Standard Galactic Alphabet decoder

  This online calculator can decode message written with standard galactic alphabet symbols

• Substitution Cipher Tool

  The tool to encrypt/decrypt messages with simple substitution cipher given as key. It is also useful for manual cryptanalysis of substitution cipher - when you have message written in English alphabet partially decrypted with automatic tool and want to tweak the key.

• Text fitness

  This online calculator computes text "fitness". That is, how similar the given text to other texts written in English language.

• Text fitness (version 2)

  This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses frequencies of unigrams, bigrams and trigrams to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from http://practicalcryptography.com/cryptanalysis/text-characterisation/quadgrams/. The less value you get, the better.

• Text fitness (version 3)

  This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses logarithms of probabilites with normalization to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from http://practicalcryptography.com/cryptanalysis/text-characterisation/quadgrams/. The less value you get, the better.

• Base 64 encoding and decoding

  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.

• List intersection

  This calculator parses list using regular expression, then counts unique matches and lists them in decreasing order