ClavaStack – Bitcoin Inheritance Plan Tool

A local-first browser tool that walks Bitcoin holders through a structured inheritance plan and turns it into a print-ready PDF (via the browser's print function). A functional clone of the Marc Steiner inheritance-plan tool, styled with Specter branding and the ClavaStack logo. The app itself is fully bilingual (EN/DE, switchable in the header).

Usage

1. Open index.html in a browser (Chrome recommended) – no build step required. Keep diagram.js and diagram.css beside it.
2. Fill out the wizard. Sections/devices you don't need can simply be toggled off.
3. Click "Create PDF" → the browser's print dialog opens.
4. Choose "Save as PDF" as the destination. Also works with the "Margins: None" print setting.

Features

• Modular wizard – only the sections/devices you select end up in the PDF:
  • General information + up to 2 trusted contacts (contact details and a relationship note are captured directly in the wizard; empty fields remain a blank handwriting line in the PDF)
  • Hardware wallets (dynamic, with a 24-word seed grid per device)
  • Software wallets (computer & smartphone)
  • Online exchanges, incl. 2FA device
  • Password manager app
  • Multisig wallet (with co-signers)
• Password-protected save & load – wizard input can be saved as an encrypted file at the end and reloaded later to continue. Encryption uses AES-256-GCM (key derivation via PBKDF2-SHA256 from a self-chosen password, through the Web Crypto API). The password is requested on save (with confirmation) and on load; a wrong password fails cleanly. Older, unencrypted plan files can still be loaded. Without the password there is no recovery – keep the file and password safe/offline.
• Predefined device/exchange lists with automatic filling of the official URLs.
• Automatic quick-overview table built from all entries.
• Two visual overviews at the end of the wizard: a connected full diagram with a distinct color for each seed and its derived paths, plus individual seed/wallet diagram cards with local wallet and service icons. Both print on fixed A4 landscape sheets with 15 mm internal margins; diagram cards are grouped on pages without cutting a card, while the full diagram offsets parallel connections and leaves clear bands at page breaks. Neither view asks for or displays seed words, PINs, passphrases, or storage locations.
• Print-optimized PDF layout: a running header (colored ClavaStack logo + URL) and footer (branding + page number) on every page, even margins on all four sides, no cut-off/overlapping content from page 2 onward (thead/tfoot spacer technique).

What the PDF looks like

The generated document never contains secrets – seed phrases, PINs and passwords stay as blank handwriting lines, filled in by hand only after printing.

Project layout

File	Purpose
index.html	Wizard and standard PDF plan (HTML, CSS, vanilla JS)
diagram.js / diagram.css	Automatically generated diagram views and print styles
assets/diagram/	Local backup, smartcard and seed illustrations used by the diagrams
assets/bitcoin-icons/	Local generic diagram icons from Bitcoin Design
sw.js / site.webmanifest	Service worker + PWA manifest for offline mode ("Make available offline")
assets/clavastack-logo.png	ClavaStack logo (source)
.github/workflows/sync-to-clavastack.yml	CI: mirrors the planner files to the ClavaStack website on every push
.gitignore	OS/editor artifacts

No external dependencies besides the Google Fonts link (Montserrat).

Live version

The current index.html runs live at clavastack.com/inheritance-planner (auto-synced on every push, see the CI workflow above).

Security notice

This document contains highly sensitive data (PINs, passwords, seed phrases) once filled in by hand. Only fill it out on a trusted device, save/print it offline, and store printouts securely.

License

Licensed under the Common Public Attribution License 1.0 (CPAL-1.0). Unlike a plain MIT/Apache license, CPAL contractually requires visible attribution: if you embed, redistribute, or build on this tool — including on your own website — Exhibit B of the LICENSE requires the single word "ClavaStack", prominently and legibly displayed in the user interface, as an active hyperlink to https://clavastack.com. No logo or additional wording is required — but it must be there, not buried in a source file or credits page.

Generic diagram symbols use selected Bitcoin Icons under the MIT license; the required notice is in assets/bitcoin-icons/LICENSE-MIT. Wallet and service logos continue to use the planner's existing local images.