Crawler Stack
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Enterprise-Grade Technical Site Crawler
Discover rendering barriers, redirect loops, and code warnings that block search engine spider discovery. Run scans with deep JavaScript mapping.
- 100,000 page crawl capacity
- JavaScript app rendering
- Redirect chain tracing
- Sitemap & Robots.txt mapping
- Canonical link validations
- Structured data auditing
Crawl Analysis Workspace
Scanning
Audit Completeness
Pages: 7,423 / 10,000
Barrier Flag
Critical Code
Broken redirect chain detected on homepage linking to /old-services
Est. Impact: High
Scan Milestones
Robots.txt Loaded
200 OK
Sitemap XML parsed
184 URL nodes
Rendering DOM paths
Active
150 pages/sec
High-performance async parsing pipeline.
54+ Core Audits
From redirects to canonical validations.
100% JS Support
Renders client-side dynamic content.
Live Simulation
Diagnose Problems Instantly
Our interface groups errors by severity levels, allowing web developers and SEO managers to easily filter and solve structural errors. Access visual logs detailing canonical paths and indexability headers.
Canonical Redirect Loops
Alerts you when a page canonical points to a redirect path, creating resource leakage.
Image Alt Optimizations
Locates large assets and highlights missing ALT content variables to improve image search rankings.
Crawl Warnings & Issues Log
Critical: 4
Warning: 12
| URL Path | Status | SEO Issue | Action |
|---|---|---|---|
/blog/old-seo-tips |
404 Error | Broken internal target | |
/about-us |
Duplicate H1 | Two H1 page headers | |
/services/design |
301 Redirect | Redirect loop check |
Frequently Asked Questions
SignalSumo can scan up to 100,000 pages per domain for Agency plans. Free guests are capped at 200 pages, with Starter and Pro plans enabling 5,000 and 10,000 page crawls respectively.
Yes, our crawler has full support for JavaScript rendering (Apify integration). This allows it to render single page applications built in React, Vue, Next.js, and Angular, ensuring client-side links are mapped.
Absolutely. The site crawler automatically detects sitemap.xml files, checks robots.txt definitions, and maps internal link structures according to canonical guidelines.