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Railfence cipher

Please note that these tools aren't optimized for large amounts of data, processing can slow down or run into problems once you reach above 150,000 characters. A cap of 1 million characters is currently in place.

Also known as the Zig Zag cipher, takes its name from the way in which the encryption is performed - in analogy to a fence built with horizontal rails. Below is an example using 3 rails, more rails equals more complexity and makes it harder to decode without the correct number of rails. There is more information available on the Rail fence cipher Wikipedia page.

WE ARE DISCOVERED. RUN AT ONCE. W . . . E . . . C . . . R . . . U . . . O . . . . E . R . D . S . O . E . E . R . N . T . N . E . . A . . . I . . . V . . . D . . . A . . . C . WECRUO ERDSOEERNTNE AIVDAC