The Node module base-x (https://www.npmjs.com/package/base-x https://www.npmjs.com/package/base-x) can be used to encode and decode these using the alphabet 123

The Node module base-x (https://www.npmjs.com/package/base-x https://www.npmjs.com/package/base-x) can be used to encode and decode these using the alphabet 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz Shameless plug: I have a port of it in Go (https://github.com/eknkc/basex https://github.com/eknkc/basex) and .NET (https://github.com/eknkc/basex-dotnet https://github.com/eknkc/basex-dotnet)