The Symbol Frequency Table Calculator
The Symbol Frequency Table Calculator is a tool that takes in a text message and produces a table of the frequencies of each symbol (i.e., character) that appears in the message. The calculator can be customized to ignore spaces and/or case, allowing for a more accurate analysis of the message's symbol frequencies.
Shannon Entropy
This online calculator computes Shannon entropy for a given event probability table and for a given message.
Wordpress plugin
With Planetcalc plugin for Wordpress you can easily insert any planetcalc calculator in your wordpress-based site or blog pages.
Gravity Falls Author's symbol substitution cipher decoder
This online calculator can decode messages written in the Author's symbol substitution cipher
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