Open-source SEO auditor: crawls 500 pages with 74 metrics per page

tom_doerr · x · 2026-08-26

Open-source project on-page-seo discovers pages via Firecrawl and analyzes 74 SEO metrics per page with DataForSEO, auditing up to 500 pages at once. It tracks Core Web Vitals (LCP/FID/CLS), offers live progress updates and CSV/JSON export, and is built on React 19 + TypeScript/Vite with a Node backend. The author also documented on YouTube how it evolved from an n8n workflow into a full app. The repo has 128 stars.

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