Crawler Log Analyser

6.0easy start · #19 of 27
in SEO Log File Analysis Tools

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you worknot on record

Runs on Linux.

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Crawler Log Analyser is ranked #19 of 27 in SEO log file analysis tools on The Geeks Club. It runs on Linux.

Compared on SEO log file analysis tools

Crawler segmentation: Yes
Search Console integration: No

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The record

Purpose: Crawler Log Analyser provides operational SEO observability for self-hosted static sites running nginx.
Log parsing: It parses nginx access logs in combined or extended seo_crawl format, including rotated .gz logs.
Crawler analysis: It classifies search and AI crawlers and scores Googlebot and broader search-crawler health from observed responses.
Deploy anomalies: It detects crawler-visible deploy-window issues such as robots.txt failures, content-404 bursts, and post-404 crawl gaps.
Additional detections: It can detect sitemap-path user-agent spoofing and rotating bot identity claims from a single IP.
Reports: It emits text, Markdown, or JSON reports and can exit non-zero on critical findings for cron and CI use.
Integrations: JSON output is the stated integration boundary; the README says it has no Slack, Prometheus, Elasticsearch, or SaaS integrations.
Privacy and architecture: The maker describes it as a single-file Python script with no telemetry, dashboards, database, external services, or external dependencies.
Requirements: The current README specifies Python 3.11 or later and nginx logs, with no Apache or IIS support guarantee.
License: It is licensed under AGPL-3.0-or-later, which permits commercial use and internal modification; network-service modifications must make corresponding source available.
Intended users: The maker positions it for operators of self-hosted static sites who need to inspect real crawler behavior in nginx access logs.
Project status: The repository identifies v1.10.2 as its status and says feature work was frozen through 31 August 2026, while bug fixes and security fixes remain welcome.
Support: The README welcomes pull requests and says project review may be slow because it is maintained as time permits.
Maker: SpeyTech describes its work as commercial safety-critical systems alongside open-source projects and lists Inverness, Scottish Highlands, UK as its location.

Where it ranks on The Geeks Club

Best SEO Log File Analysis Tools in 2026#19 of 27

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Sources

github.com/SpeyTech/crawler-log-analyser· checked 4 Oct 2026
speytech.com/insights/operational-seo-observability/· checked 4 Oct 2026
speytech.com/open-source/· checked 4 Oct 2026