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open-seo is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
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wordpress-seo is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
Agentic-SEO-Skill is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
astro-seo is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
awesome-seo is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
Black SEO Analyzer is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
next-seo is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
30x-seo helps research keywords, search demand, related terms, and content opportunities for SEO.
github.com
agentic-seo-skills helps plan, write, optimize, or analyze content for SEO and search visibility.
github.com
claude-seo helps analyze backlinks, find link opportunities, and support SEO outreach workflows.
github.com
codex-seo helps analyze backlinks, find link opportunities, and support SEO outreach workflows.
github.com
jekyll-seo-tag helps plan, write, optimize, or analyze content for SEO and search visibility.
github.com
seo-audits-toolkit helps research keywords, search demand, related terms, and content opportunities for SEO.
github.com
seo-os helps monitor local SEO visibility, map rankings, business listings, and local search performance.
github.com
svelte-seo helps manage meta tags, Open Graph data, and social sharing previews for websites.
librecrawl.com
LibreCrawl is a free, open-source SEO crawler offered as an alternative to Screaming Frog. It performs technical audits covering meta tags, schema markup, hreflang, social tags and PageSpeed metrics, and integrates Playwright for JavaScript rendering of single-page applications. The project is MIT-licensed and can be self-hosted, with CSV, JSON and XML exports. A REST API provides programmatic control of crawls.
seo-cheat-sheet.9elements.com
A sorted list of technical on-page SEO best practices from 9elements, organized by HTML tags. It covers the title, meta description, heading, alt, canonical, Open Graph, responsive site meta and robots tags, with notes on recommended lengths and keyword use.
seonaut.org
SEOnaut is an open source SEO auditing and reporting tool. It crawls websites and checks for broken links, redirects, duplicated or missing meta tags, heading issues, hreflang problems and missing image alt attributes. The tool can be configured to crawl subdomains or sitemaps, follow nofollow links, check external links and access password-protected sites via HTTP Basic Authentication. It can also create WACZ archives of a site.
github.com
openserp tracks rankings, SERP visibility, and keyword performance across search results.
github.com
1000UserGuide is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
advertools is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
aimeos is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
aimeos-typo3 is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.
github.com
anqicms is an open source tool or library for SEO, metadata, crawling, routing, or website optimization.