I built a free and open source tool to make working with the IAB content taxonomies less painful.

Converts IAB Content Taxonomy 2.0 → 3.0 automatically

Runs fully local, no data leaves your machine

Multiple methods supported (BM25, TF-IDF, embeddings, LLM re-ranking)

Simple demo UI + CLI available

pip install iab-taxonomy-mapper

Why? Agencies, adtech, and publishers often need to upgrade taxonomies, but mappings aren’t always 1:1. This tool provides ranked candidates and options, saving hours of manual work.

GitHub: https://github.com/mixpeek/iab-mapper Demo: https://mxp.co/taxonomy

Would love feedback on whether this is useful in your workflow and ideas for what to add next.