Screaming Frog SEO Spider is a popular website crawler used for technical SEO audits. The list below gathers 20 free (or free‑tier) SEO tools that can replace or complement its functionality—ranging from full‑site crawlers to on‑page analyzers, performance testers, and backlink explorers.
Get targeted exposure with custom position pinning and highlighted placement.
Desktop crawler that mirrors Screaming Frog’s core features—unlimited URL crawling, on‑page data extraction, and CSV/Excel export—all without cost.
Classic Windows utility for checking broken links, generating site maps, and reporting HTTP status codes; completely free and lightweight.
Free version of the WebSite Auditor tool that crawls sites, analyses on‑page SEO, and produces HTML reports; limited to 10,000 URLs per project.
Google’s own suite for monitoring site performance, indexing issues, mobile usability, and core web vitals—essential for any SEO workflow.
Analyzes page speed and Core Web Vitals, offering actionable recommendations for both mobile and desktop performance.
Provides page‑load analysis, waterfall charts, and performance scores (PageSpeed & YSlow) with a limited number of daily tests for free users.
Free Ahrefs suite for site owners: crawl health reports, backlink overview, and keyword rankings—all without a paid plan.
Limited free access to Moz’s backlink database, domain authority metrics, and link‑growth trends.
Neil Patel’s tool offers site audit (up to 100 pages), keyword ideas, and backlink data in its free tier.
Free Chrome/Firefox extension that displays SEO metrics, page diagnostics, and internal/external link analysis on the fly.
Lightweight extension for on‑page SEO checks, SERP preview, and broken‑link detection directly in the browser.
AI‑driven site audit platform offering free performance, SEO, and Core Web Vitals reports for up to 5 pages per month.
All‑in‑one SEO suite with site crawl (up to 20,000 pages), on‑page checks, and backlink monitoring for free accounts.
Provides a free website health check covering crawlability, SEO, and performance with limited daily scans.
Free online crawler that generates XML sitemaps, detects duplicate content, and reports broken links without installing software.
Free tier includes a site audit for up to 5,000 pages, on‑page SEO suggestions, and a visual site‑map overview.
Desktop crawler offering unlimited URL crawling, SEO‑audit reports, and export options in its free edition (limited to 5,000 URLs per project).
Enterprise‑grade crawler with a 14‑day free trial; provides comprehensive crawl reports, JavaScript rendering, and structured‑data checks.
Technical SEO platform offering a 14‑day free trial that includes full site crawl, log‑file analysis, and data visualisation.
The free tier of Screaming Frog itself—crawls up to 500 URLs per run, provides essential SEO data, and allows CSV export.