Deep Engine

Cloud-Native Technical SEO Crawler

Engineered for high-precision technical audits. Discover every broken link, redirect chain, canonical mismatch, and duplicate page without running heavy desktop software.

Crawling Architecture

Dual Engine: Blazing-fast Cheerio HTML parser + Headless Chromium for full JavaScript hydration.
Robots.txt & Sitemap Discovery: Full RFC 9309 parser, sitemap index traversal, and crawl delay respect.
URL Normalization: Strips tracking parameters, handles trailing slash normalization, and prevents infinite loops.
Checkpoint Resumption: Saves crawl state per URL so large sites can be recovered without re-scanning from scratch.

Comprehensive Issue Detection

404 Broken Internal Links

301/302 Redirect Loops

Canonical Tag Mismatches

Noindex & X-Robots Blockers

Missing H1 or Multiple H1s

Duplicate Titles & Descriptions

Images Without Alt Attributes

Invalid Schema.org JSON-LD