Server log analyzer for SEO
Drop one or several log files (Apache/Nginx, combined format preferred) — handy for rotated files (access.log, access.log.1…). The analysis runs entirely in your browser: files are never sent to a server, even with several GB of logs. In seconds you get Googlebot and AI crawler activity, most-crawled pages, wasted crawl budget and errors served to bots.
No upload · no IP transmitted · GDPR-safe
Why analyze your website's server logs
Classic crawl reports (Search Console, third-party tools) estimate robot activity. Your server logs record it: every visit from Googlebot, Bingbot or an AI crawler leaves a timestamped line with the requested URL and the response code. Analyzing those logs means moving from estimation to proof.
Three things show up in almost every first analysis: wasted crawl budget (bots spending time on URL parameters, static files or technical paths instead of your strategic pages), error pages only robots see (a 404 or 500 served to Googlebot but invisible to your visitors), and crawl concentration on a handful of URLs while the rest of the site goes barely crawled.
In the AI search era, log analysis gains an extra dimension: it reveals which AI crawlers visit your site (GPTBot, ClaudeBot, PerplexityBot, Google-Extended…), how often, and on which content. Key information for GEO (Generative Engine Optimization) that classic tools don't surface yet.
Frequently asked questions
What is a server log analyzer for SEO?
It is a tool that reads your server's access log files (access.log) and extracts search engine robot activity: which URLs are crawled, by which bots, how often, and with which response codes. It is the most reliable source there is to understand how your site is actually crawled — no estimation, no sampling.
Which log formats are supported?
Apache/Nginx "combined" and "common" formats, including .gz compressed files (useful for rotated logs like access.log.1.gz). You can drop several files at once: they are aggregated into a single analysis.
Are my log files uploaded to a server?
No. All processing happens in your browser, streaming. Your logs — and the IP addresses they contain — never leave your machine, are never stored, and vanish when you reload the page. Privacy-safe by construction (GDPR-friendly).
Which AI crawlers does the tool detect?
GPTBot and OAI-SearchBot (OpenAI), ClaudeBot (Anthropic), PerplexityBot, Google-Extended, Bytespider, Amazonbot and others, in addition to classic search engines like Googlebot and Bingbot. The tool also separates training crawl from citation crawl, and verifies bot authenticity against official IP ranges.
How large a file can I analyze?
Several gigabytes in total. Files are read as streams, never fully loaded into memory: a full month of logs goes through without slowing anything down. And since nothing is uploaded, there is no server-imposed size limit.
Is the tool really free?
Yes, entirely — and with no sign-up. There is no paid tier, no limited trial, no account to create.