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.
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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