Offline BIP39 Seed Checksum Calculator: Secure, offline CLI tool to compute the 24th BIP39 word.

Hi Product Hunt! 👋 I built the Offline BIP39 Seed Checksum Calculator to solve a critical security issue in the crypto space: trusting online tools with your mnemonic phrases. While there are web-based checksum calculators out there, typing 23 words of your master seed into any browser interface carries inherent risks—from malicious browser extensions to compromised servers. I wanted a professional, zero-trust solution. That's why I created this lightweight CLI app for Windows and Linux. It operates 100% offline. You enter 23 custom words, and it securely computes the final 24th checksum word locally on your machine. No internet required, no data transmitted. If you value your crypto privacy, I'd love for you to check it out! I'm here all day to answer any technical questions about how it works under the hood. Stay secure!