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

This online calculator can be used to summarize lines of text, using regular expressions to extract a unique value from each line, such as a date or session ID.

This online calculator numbers lines of text

The reverse line calculator is a simple tool that takes a block of text as input, breaks it into individual lines, and then reverses the order of the lines. This can be useful in a variety of situations where you need to quickly reverse the order of lines in a document or piece of code, such as when working with logs, scripts, or data files.

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

The random symbol generator is a simple tool that allows users to generate a specified number of symbols randomly selected from a given set of symbols. Users can choose the number of paragraphs and the number of symbols per paragraph to be generated.

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.

This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses logarithms of probabilities 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.