Addonist by Ljubica
Technical SEO tools and practical guides
I’m a technical SEO and data analyst. I build small tools for the problems I run into in real audits, and share them here with guides on how to use them.
Tools for SEO, GEO, and content audits
Small tools for specific SEO problems
Each tool does one job: test crawler access, find similar content, extract page text, or keep an eye on your backlinks. Use the one you need, or combine them.
Free script: AI & Search Crawler Access Checker
Find out if your CDN or firewall blocks GPTBot, ClaudeBot, Googlebot and 32 other crawlers, not just what robots.txt allows.
Free web app: Content Cannibalization Tool
Find duplicate and near-duplicate content across your site, grouped by topic and ready for your decisions.
Free AppsScript: Content Extractor for Google Sheets™
Get clean page text, status codes and indexability for any list of URLs, without a crawler.
Google Sheets™ add-on: Backlink Monitor
Check that your important backlinks are still live, and get alerts when they’re removed or turn nofollow.
About Addonist
Built from real audit work
I’m Ljubica, a technical SEO and data analyst. Addonist is where I publish the tools and scripts I build in my free time, usually because I needed them for an audit and couldn’t find one that did the job.
- One job each. Small tools that do one thing well, without dashboards to learn.
- Open code. You can read the code of the free tools before you run them.
- Your data stays yours. The tools run in your own Google account or browser session, and your files and API keys aren't stored.
