01 Enter your seed phrase
Paste your 12, 15, 18, 21, or 24 BIP39 words. They stay on this device and are never sent anywhere.
02 Choose configuration
Pick the total number of shares and the threshold (how many shares are needed to recover).
Total shares (N)
Threshold (T)
03 Generate shares
Each share is a 33-word OMDP39 share encoded with the BIP39 English word list. Store each share separately.
Your seed phrase grants full access to your wallet. Run this tool offline on a trusted device (e.g. air-gapped laptop or a freshly booted live system) for maximum security.
01 Enter your shares
Paste each 33-word OMDP39 share into its own field. You need at least the threshold (T) shares from the same set.
02 Recover secret
The original seed phrase is computed locally from the shares you provided.
BIP39 English wordlist
The full 2,048-word BIP39 reference list, grouped alphabetically by initial letter and still shown with the official BIP39 index. Useful for verifying words by hand, cross-checking paper backups, or disambiguating a word fragment (BIP39 words are unique in their first 4 characters).
Base24 encoding for physical backup
Convert a 33-word sequence (e.g. an OMDP39 share) into a compact 96-character Base24 string, suitable for steel tile backups. Uses only the alphabet 0123456789ABCDEFGHJKMNPR. The characters I, L, O, and Q never appear in Base24.
→ 33 words → 96 Base24 characters
Paste one 33-word OMDP39 share encoded with the BIP39 English word list.
← 96 Base24 characters → 33 words
Paste the 96-character Base24 string. Whitespace and grouping (e.g. ABCD EFGH …) are tolerated.
Alphabet & backup recommendation
Values 0–23 map to these glyphs. The allowed alphabet is exactly 0123456789ABCDEFGHJKMNPR. Q is not a valid Base24 character; I, L, O, and S–Z are not used either.