[dps]

Author of the post here… Cool to see this back on HN! I was trying to provide instructions that anyone could use regardless of platform, hence the choice of web tools (both those linked process the data locally). If you know of a base32 decoder that’s easily available on Windows, Mac and Linux I’d be delighted to update the post.

[fragmede]

WSl means Unix command line tools are available on windows as well these days.

[johnisgood]

OpenSSL, base32, basez, C program, Python or Lua script? I have a Lua script that generates TOTP (with base32 decoding), for example. What are your requirements, would either of these suffice?