Overview

SEO Log Auditor is a free, open-source tool for turning server access logs into reports on search crawler activity. It is best suited to site owners and SEO practitioners who want to investigate crawling locally rather than adopt an enterprise platform. Its focused reports and no-cloud workflow are compelling, though the Grafana/Loki route depends on exported logs rather than direct streaming.

Key features

Seven views give log analysis a practical troubleshooting focus. Crawl-budget reporting separates requests by user agent and highlights bot-to-human ratios, helping reveal how crawler attention is distributed. The orphan-URL view compares bot-accessed URLs with sitemap and internal-link signals, while status-waste reporting ranks frequently crawled non-200 URLs, including 4xx and 5xx responses. These views make it easier to spot crawl effort going to pages that may deserve attention.

Stale-page reporting flags URLs that major crawlers have not visited in 30 or more days. Performance reporting aggregates server response times by URL to surface slow pages, and parameter-trap reporting finds URL patterns with high parameter variance, including session IDs, filters, and sort orders. The set is useful for targeted technical SEO diagnosis, not a substitute for a broader analytics suite.

Bot verification compares declared user agents with known reverse-DNS signatures to help identify traffic impersonating Googlebot or Bingbot. That gives users a way to look beyond the user-agent label when assessing crawler requests. Crawler segmentation and crawl-waste reports further support this focused workflow.

The project accepts nginx and Apache access logs and runs locally on a laptop without a database or cloud dependency. Its local-first approach, no telemetry, and no log uploads suit teams that prefer to keep server logs on their own machines. Setup requires cloning the repository, installing requirements, and launching the Streamlit app, so it is less turnkey than a hosted service. The project uses Python, Streamlit, and Pandas and is MIT-licensed.

For Grafana/Loki users, the described workflow is to upload a 30-day export in JSON, CSV, or plain text and enter a sitemap URL. Direct Loki API streaming is a roadmap item, not part of that workflow; users seeking a live connection should look elsewhere.

Pricing

SEO Log Auditor costs 0.00 USD per free. The free plan is the open-source MIT-licensed tool itself, with local operation rather than a paid tier or subscription. There is no free trial because the product is free. That removes recurring software cost, but users take on the repository setup instead of paying for a packaged hosted workflow.

Platforms

SEO Log Auditor is available for Linux, macOS, Windows, and the web. Its described operating model is a locally launched Streamlit app, which makes it a fit for people comfortable running the provided setup commands on a laptop.

Who it's for

The tool is aimed at making log analysis accessible beyond enterprise SEO teams. It fits site owners and SEO practitioners who can provide nginx or Apache logs and want focused reports on crawler allocation, errors, stale pages, bot authenticity, and URL patterns. It is a weaker fit for users who need direct Loki API streaming or prefer a hosted service that avoids local setup. Support is available through the project’s GitHub link, and the maker invites users to contact Hiten.

Pros and cons

Pros: Seven focused report views turn raw logs into actionable crawl and technical SEO questions.
Pros: Local processing, no telemetry, and no log upload keep access logs on the user’s machine.
Pros: The MIT license and 0.00 USD per free price avoid subscription costs.
Cons: Grafana/Loki analysis uses uploaded exports; direct API streaming is not available in the described workflow.
Cons: Setup requires cloning the repository, installing requirements, and launching the app rather than simply signing into a hosted product.

Alternatives

Choose Screaming Frog SEO Log File Analyser if you want a freemium option with a 1,000-log-event-line, one-project free tier and a paid plan at 139.00 USD per year. SEOMER is a web-based alternative for quick page checks, with limited daily usage on its free plan and a 5.00 USD one-time 5,000-token top-up.

LogLens may suit users who prefer API, self-hosted, or web access and want real-time analytics; its free plan includes 500K requests per month, one website, and 30 days of history. Choose Nirengi Log Analyzer if you specifically want a free macOS app for macOS 14.4 or later, with no subscription or in-app purchase.

Crawl Lab is another free option, web-based, with no sign-up, no paid tier, and no server-side size limit. Easy SEO Log File Analyzer Pro may fit Windows users seeking a paid suite: its CrawlRhino SEO Suite plan costs 3.99 GBP per month, auto-renews monthly until cancelled, and permits one licence key on up to three devices.

Consider EdgeComet Log Analyzer for a paid API, Linux, self-hosted, or web option; its Professional annual plan costs 87.00 USD per year and covers up to 200K Googlebot requests with two users and 30-day data history. InfoCaptor is a paid web, Windows, macOS, and Linux alternative, with cloud plans starting at 29.00 USD per month.

For more options, see SEO Log File Analysis Tools.

Verdict

SEO Log Auditor is a strong fit for budget-conscious site owners and SEO practitioners who want focused crawler diagnostics while keeping logs local. Its seven report views and zero-cost MIT license are the main reasons to choose it; the need to set it up locally and rely on exports for Grafana/Loki are the clearest reasons to look elsewhere.

	LogWerk	SEO Log Auditor
Free plan	No	Yes
Free trial	No	No
Paid from	—	Free
Open source	No	No
Platforms	Web	Linux, macOS, Web, Windows
Free plan	Yes	Yes
Crawler segmentation	Yes	Yes
Crawl waste reports	Yes	Yes
Log input methods	—	upload

LogWerk vs SEO Log Auditor

LogWerk

SEO Log Auditor