SeedCheck

Derivation runs in your browser — the seed never leaves this page. Only derived addresses are sent to check for activity.

Recovery words (BIP39 or old Electrum) — any separators; use * for one missing word

Passphrase / extra word (optional)

Addresses

Check on-chain

Deep scan

Missing a word (*)

Custom derivation path

Preset (from registry)

Account path

Coin

Type

Client-side derivation (BIP39 all paths + old Electrum, all coins). Loads no third-party code and — per its Content-Security-Policy — can only reach this server's /api/check. Save this page and run it offline to derive fully air-gapped.