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Patrick Stox Log File Analyzer

patrickstox.com

Free plan Web
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Spec score 7.3 #19 of 27 in SEO Log File Analysis Tools

What it is

Patrick Stox Log File Analyzer is a free web tool for examining server access logs and crawler behavior. It automatically detects nginx, Apache, IIS/W3C Extended, and JSON logs, including Cloudflare Logpush. Uploads and pasted logs are parsed in the browser rather than sent to the server; multiple files and large logs streamed in chunks are supported without signup. Reports show crawl budget by bot and site section, crawler activity by page type, wasted URLs, and daily trends when timestamps exist. Users can provide a sitemap or expected URL list for comparison with crawler requests. The tool produces ranked recommendations, copy-ready robots.txt lines, and CSV exports for bots and wasted URLs. It compares request IPs with published crawler ranges and marks crawlers without checkable ranges as unverifiable. An optional suspicious-IP check sends one IP for reverse-DNS and ASN lookup. Analysis covers logged requests only, not indexing outcomes or crawler URL-selection reasons.

Spec sheet

Purpose
Analyzes server access logs to show crawler activity, crawl-budget waste, AI crawler traffic, and likely crawler impersonators.Read 4 Oct 2026 · patrickstox.com
Support
The page offers bug reports through a private triage queue and feature requests that are reviewed before appearing publicly.Read 4 Oct 2026 · patrickstox.com
Audience and use cases
The maker describes use cases including measuring crawler activity, finding crawl-budget waste, comparing AI and search crawlers, and investigating possible bot spoofing.Read 4 Oct 2026 · patrickstox.com
Crawler verification
It compares request IPs with crawler operators’ published ranges and marks crawlers without checkable ranges as unverifiable.Read 4 Oct 2026 · patrickstox.com
Expected URL comparison
Users can supply a sitemap or expected URL list to compare against crawler requests.Read 4 Oct 2026 · patrickstox.com
Limits
It can only analyze requests present in the log and does not report indexing outcomes or explain why a crawler selected a URL.Read 4 Oct 2026 · patrickstox.com
Local processing
Log parsing runs in the browser, and pasted or uploaded logs are not sent to the server.Read 4 Oct 2026 · patrickstox.com
Log formats
It auto-detects nginx, Apache, IIS/W3C Extended, and JSON logs including Cloudflare Logpush.Read 4 Oct 2026 · patrickstox.com
Optional network check
The optional suspicious-IP spot-check sends a single IP to the verifier API for reverse-DNS and ASN lookup.Read 4 Oct 2026 · patrickstox.com
Privacy detail
Anonymous run-level outcome counters may be used for aggregate research, with no URLs, domains, IPs, or identifiers included and no statistic released below 100 runs.Read 4 Oct 2026 · patrickstox.com
Recommendations and export
It provides ranked recommendations with copy-paste robots.txt lines and CSV exports for bots and wasted URLs.Read 4 Oct 2026 · patrickstox.com
Reports
Reports include crawl budget by bot and section, crawler-by-page-type matrix, wasted URLs, and daily trends when logs contain timestamps.Read 4 Oct 2026 · patrickstox.com
Verification limit
IP-range matching may miss an impostor using a genuine crawler IP, and crawlers without published ranges cannot be distinguished by range matching alone.Read 4 Oct 2026 · patrickstox.com

Plans and prices

Free Free No signup · multiple files · large logs stream in chunks Read 4 Oct 2026 · patrickstox.com

Every Patrick Stox Log File Analyzer plan and price →

Strong points and limits

Strong points

  • Browser-based parsing keeps uploaded logs local
  • Automatic detection of four log families
  • Crawl-budget and wasted-URL reports
  • Robots.txt recommendations and CSV exports
  • No signup and multiple-file uploads

Limits

  • Only analyzes requests present in logs
  • Does not report indexing outcomes
  • IP-range checks can miss impostors
  • Optional IP check sends data to an API

Who it suits

This tool suits site owners and technical teams measuring crawler activity, finding crawl-budget waste, comparing AI and search crawlers, or investigating possible bot spoofing.

Verdict

Patrick Stox Log File Analyzer provides focused crawler reporting from access logs with local parsing and practical exports. Its conclusions remain limited to recorded requests and the available crawler IP ranges.

Where Specifiction places it

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