I built 9 free SEO tools so I'd stop paying $100/mo to audit my own sites

A developer managing over ten web products stopped paying monthly $100 SEO subscriptions by building a custom technical-audit engine. The original suite's keyword and backlink features remained unused, prompting the creation of nine free, no-signup tools. These tools focus on essential technical layers, specifically crawlability and indexability. Key checks include robots.txt blocks, noindex tags, canonical conflicts, and non-200 status codes, ensuring pages are indexable and capable of ranking without expensive monthly recurring costs.