Screaming Frog SEO Spider

What it does

It crawls a site and returns a spreadsheet-grade view of every URL and its technical attributes.

• Finds broken links (404s), redirect chains and loops, and server errors.
• Audits titles, meta descriptions, headings, canonicals, hreflang and robots directives at scale.
• Renders JavaScript to crawl client-side sites (paid licence).
• Extracts structured data and validates against Schema.org and Google requirements.
• Integrates GSC, GA4 and PageSpeed data, and supports custom extraction via XPath/CSS.

Where it fits in your stack

Screaming Frog is the technical-audit workhorse. Where Ahrefs and Semrush give a sampled, cloud-side view, Screaming Frog gives you a complete, precise crawl of exactly the site in front of you — ideal for migrations, pre-launch checks and finding the long tail of on-page issues that surface-level tools miss.

Strengths and limits

Strength: fast, thorough, endlessly configurable, and cheap for what it does (an annual per-seat licence). Limit: it is desktop software with a steep learning curve, large crawls consume RAM (mitigated by database storage mode), and it has no cloud reporting, scheduling dashboards or rank tracking. You still need other tools around it.

How REO Rank uses it

Screaming Frog is our first stop on any technical SEO audit and every site migration. We connect it to Search Console and GA4 so a single crawl shows which broken or non-indexable pages actually earn traffic, then prioritise fixes from there.