Developer Tools vs Screaming Frog SEO Spider

devtools.tr is a free toolbox of 173 web and developer tools for webmasters, developers and system administrators. Every check runs live against real servers: DNS lookup, SSL/TLS and security headers, website analyzer with PDF reports, SEO and Core Web Vitals, TTFB, CDN and compression tests, IP geolocation, WHOIS, ASN and blacklist checks. Developer utilities include a JSON formatter and validator, regex tester, Base64, UUID, SQL/HTML/CSS/JS formatters and minifiers. Results come as clear reports with scores and ready-to-paste fixes for Apache, nginx and Cloudflare. No sign-up, no limits, fully in English and Turkish, and works on mobile.

Screaming Frog SEO Spider is a desktop crawler used by nearly every technical SEO. It crawls websites like a search engine to find broken links, redirect chains, duplicate titles and descriptions, missing tags, thin pages, canonical and hreflang problems, orphan pages (with GA/GSC data), structured data validation and more. The paid licence adds JavaScript rendering, scheduling, custom extraction with XPath and regex, and API integrations including LLMs for content analysis.

It is sold as an annual licence rather than SaaS, runs on Mac, Windows and Linux, and handles sites of hundreds of thousands of URLs with enough memory. Sitebulb is the more visual alternative; cloud crawlers like Lumar serve enterprises.

The tool is made by Screaming Frog, a UK search marketing agency, and the licence is priced per user per year with no limit on the number of sites you crawl. Regular version updates add features such as crawl comparison, segmentation and custom extraction with AI providers, so renewing keeps the tool current. Many SEO teams pair it with Google Search Console data and the company's separate Log File Analyser for a complete technical picture.