Already have a punched card? Generate from card code
The dashed number printed below the cards on your stencil: seed codes start with 1, passphrase codes with 2. You get the stencil, reader, BIP-39 wordlist and ASCII table for that card's whole set.
Width × height of your metal card blank, in millimeters.
Blank margin around the punch grid inside the card. More padding means a safer distance from the edge.
The seed won't be included in the generated PDF.
Print multiple identical stencils if you're punching more than one backup card set.
Rows of words per card, useful for taller cards.
Store each word as its 4-letter prefix, its BIP-39 index digits (0–9), or as an 11-column binary punch pattern. Binary needs the fewest punches and fits best on very small metal plates.
The passphrase won't be included in the generated PDF.
Passphrase cells default to 2 mm.
Defaults to 2mm.