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A PHP package providing a fluent builder for all Schema.org types and their properties. Its classes are generated from Schema.org's JSON-LD standards file, and types can be converted to arrays, rendered to scripts, or encoded as JSON. Installation is via composer.
Lighthouse Rich Result Checker helps create or test structured data, schema markup, and rich-result eligibility.
Koala AI is an AI SEO platform. It includes an SEO agent that plans from Search Console data, a writer that drafts on-brand articles, and one-click publishing to a CMS. It also bundles KoalaChat, KoalaImages, KoalaLinks and KoalaMagnets. KoalaLinks is an internal linking tool that works with WordPress, Shopify, Webflow, Ghost and custom sites.
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.
