Kryptos Sandbox

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STARTER CLIPS

▦No grids yetCreate a grid or paste some text to begin.

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0 gridsNo selectionAutosnap 8 px

GRID

Name

Columns Cell size

Grid text

LETTER COLOUR

Select letters in a grid, then choose a colour.

ALPHABET

GRID OPERATIONS

ASelect first grid

BSelect second grid

Snap & combineAdd letters when grids overlap

Show indicesDisplay alphabet values in cells

Combine operation

CURRENT SELECTION

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0 characters

INDEX OF COINCIDENCE

—English ≈ 0.0667

Random null likelihood—

Null SE · z-score—

ENGLISH FREQUENCY FIT

—similarity score

Random string matches this well—

VIGENÈRE PERIOD SCAN

Test candidate key lengths by averaging the IC of their vertical columns.

Test periods 1–24English ≈ .0667

Select enough letters to scan

GRID LINE DIAGNOSTICS

Find locally unusual lines using English n-grams, IC, frequency fit, repeated bigrams, and alphabet coverage. Click a line to select its cells.

Select a grid with at least four letters.

linerelative n-gram evidenceICfit

2D GRID ROUTE EXPLORER

Read the current shape without compacting its holes, then rank each traversal with English bigram, trigram, and quadgram evidence.

Select a grid with at least eight letters.

MODULAR ROUTE SCAN

Test every full-cycle stride N. Rank direct English, or undo a transposition and search the result for a Vigenère key length.

Scoring model

Also test a virtual +1 gap 2-gram 3-gram 4-gram

Select at least 8 letters; the scan starts automatically when the selection settles.

LETTER FREQUENCIES

Select letters to analyse

TOP BIGRAMS

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