Privacy Policy
1. Our Commitment to Privacy
The BIP39 Mnemonic Verifier is a free, open-source, fully client-side web utility designed to help users check whether words in a mnemonic phrase belong to the official BIP39 wordlist. We take your privacy extremely seriously. We collect, store, transmit, or process zero personal data or user content. Everything happens in your browser — nothing ever leaves your device.
2. Information We Do Not Collect
Because the tool runs entirely client-side, we do not collect:
- Any part of your mnemonic phrase or input text
- Personal information such as name, email, IP address, or device identifiers
- Usage analytics, timestamps, or session data
- Browser fingerprinting data or tracking cookies
Your mnemonic phrase, passphrase (if entered), and all validation results remain exclusively on your device for the duration of your visit. When you close or refresh the page, everything is discarded.
3. How the Tool Operates
All processing — word splitting, lowercase normalization, whitespace trimming, and comparison against the 2048-word BIP39 list — occurs using standard JavaScript in your browser. The wordlist itself is a static array embedded in the application bundle. No server requests are made at any point, not even for analytics, fonts, or updates. The site is hosted statically (e.g., GitHub Pages), meaning there is no dynamic backend capable of logging or storing data.
4. No Cookies or Tracking
We use no cookies, localStorage, sessionStorage, or any other persistent storage mechanism. The application is stateless — nothing is saved between visits. There are no third-party scripts, trackers, pixels, or analytics services (no Google Analytics, no Matomo, no Plausible, nothing).
5. Security Considerations
Although we collect no data, the security of your mnemonic ultimately depends on your device and browser. We recommend:
- Using the tool in a secure, up-to-date browser
- Avoiding public or shared computers
- Never pasting real mnemonics into untrusted environments
- Using this tool only as a quick wordlist sanity check, not as a replacement for full wallet recovery software
6. Children’s Privacy
This tool is not directed to children under the age of 13. We do not knowingly collect or process data from children.
7. Changes to This Policy
We may update this Privacy Policy occasionally. Changes will be posted here with a new effective date. Because we collect no data, material changes are unlikely.
By using the BIP39 Mnemonic Verifier, you acknowledge that no personal or mnemonic data is collected, stored, or shared. Your privacy is protected by design.