BIP39.ai
Online · runs in your browserOnline

Tools on this site compute in your browser. Nothing you type is sent to a server, stored, or put in the URL.

To check this yourself, open your browser’s developer tools → Network, use a tool, and confirm no request is made.

A website can still be changed by whoever controls the server. For a real recovery phrase, use the verified offline file.

Changelog

Every release that changes a tool, the offline file or published content. The current offline file’s hash is on the Offline page.

v0.1.0 ·

  • First release: Generator, Validator, Converter, Checksum and Word List tools.
  • Learning pages: What Is BIP39, Passphrase, and the first two guides.
  • Standalone offline HTML file with published SHA-256.
  • Security, Privacy and Open Source pages.
  • All 24 official English test vectors and 120 python-mnemonic cross-checks run on every build.