Browse free open source SEO tools and projects below. Use the toggles on the left to filter open source SEO tools by OS, license, language, programming language, and project status.
GEO-first SEO skill for Claude Code
World's first seo control panel for multiple websites
Next SEO is a plug in that makes managing your SEO easier in Next.js
A free, feature-rich web analyzer and exporter/cloner you will love!
A cross-platform sitemap pnp handler written in Go.
Free online developer tools JSON formatter, Base64 encoder, and more
This is a base PHP framework for making simple websites with clean URL
The Automated Validation Assistant for dev teams.
Full SEO (Search Engine Optimization) app for Android.
AEO tracking toolkit (CLI + dashboard) built for AI agents like Claude
Intelligent SEO keyword miner and predicing tool
Plugin to add metadata tags for search engines and social networks
Open Source SEO & SEM Text Creation Tools for free Article Writer
A specialized Claude Code workspace for creating long-form
Seo Tool: AI Autoblogger for ArtikelSchreiber.com and UNAIQUE.net