Alpha Crawler: The All-In-One Technical SEO Crawler, Explained Feature by Feature

Most technical SEO problems are invisible from the browser. A page can look perfect to a visitor while carrying a duplicate title, a missing meta description, seven H1 tags, a 400KB JavaScript payload and no entry in the sitemap. Alpha Crawler exists to make all of that visible in minutes — for free, on crawls of up to 10,000 pages.

One Crawl, Every Signal

Enter a URL, press Launch, and the crawler discovers your sitemap, traverses the internal link graph and validates every response. The dashboard tracks discovery, validation rate, anomalies and average latency live, then rolls everything into a Technical Health composite score benchmarked against the top 10% of websites.

A Diagnostic Issue Log That Covers the Whole Checklist

Every check is grouped by category and ranked by impact — Critical, High, Medium and Low — with the number of affected pages on each card:

• Page titles: duplicates, too long, too short (with character/pixel validation)
• Meta descriptions: missing, duplicated, too long
• H1s: missing H1 and H1 balance mismatch
• Content: low text-to-HTML ratio; image alt integrity
• Links & response codes: orphan pages with no internal inbound links
• Sitemap diagnostics: live pages missing from your XML sitemap
• Performance: render-blocking resources, unused JS execution, large JS payloads, long main-thread tasks

From Issue to URL to Fix in Two Clicks

Click any issue and the Internal Pages table filters to the affected URLs. Click a page and every problem on it appears as badges. Click Full Page Details and you get the complete anatomy of that URL: on-page metrics, DOM depth, script counts, text ratio, the inbound/outbound link graph with anchor text and status codes, a property-by-property structured data validator, and an asset execution timeline showing exactly where rendering time goes.

Architecture, Schema and Source Code Views

The Directory List groups every URL by folder depth with status, indexability and word count. The interactive Site Tree draws your whole site as a pannable node graph. Schema Distribution shows the structured-data footprint of the site and of each page. Source Code Distribution breaks your total asset count into HTML, CSS, JavaScript, images and other files — an early warning for page-weight problems.

Built for the AI Search Era

The dashboard parses your robots.txt and reports whether AI crawlers — ChatGPT-User, OAI-SearchBot, Googlebot and Google-Extended — are allowed to access your site. Sites silently blocking these bots are invisible in AI-generated answers, and most owners never know.

AI Insights and Exports Everywhere

Every report includes an on-demand AI Summary (powered by your own Gemini key, stored locally) that converts raw data into a prioritised action plan. And every report — pages, assets, issues, analytics, schema — exports to CSV and XLSX, respecting your active filters, so a filtered issue list becomes a ready-made ticket list for your developer.

Try it now on your own site — it's free — and if you get stuck on any diagnostic, write to us at support@alphacrawler.org.