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Tech riderRev. 21 Sept 2026

LogWerk

Ch 245.6of 27 SEO Log File Analysis Tools
  1. 1Runs onWeb
  2. 2CostsNot stated by the maker
  3. 3Crawler segmentationYes
  4. 4Crawl waste reportsYes
3 lines stated Written from the maker's own pages: abbottis.github.io
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The LogWerk homepage

Overview

LogWerk is ranked #24 of 27 in SEO log file analysis tools on Specifiction. It runs on Web.

Compared on SEO log file analysis tools

Free plan
Yesabbottis.github.io
Crawler segmentation
Yesabbottis.github.io
Crawl waste reports
Yesabbottis.github.io

Facts

What it does
LogWerk is an offline-first server log analyzer that runs in a web browser.github.com · 8 Oct 2026
Intended users
It is built for developers, sysadmins, and site operators who want to understand traffic without setting up a full log analytics stack.github.com · 8 Oct 2026
Log formats
It detects Nginx and Apache log formats automatically and also supports manual presets and custom regular expressions.github.com · 8 Oct 2026
Crawler analysis
It classifies more than 70 known bots and crawlers by provider and purpose, including AI crawlers.github.com · 8 Oct 2026
Traffic analysis
Its dashboard reports traffic over time, HTTP statuses, paths, client IPs, browsers, operating systems, referrers, and other traffic insights.github.com · 8 Oct 2026
Security features
Its Security tab detects listed attack patterns and reports suspicious IPs, 404 paths, and failed logins.github.com · 8 Oct 2026
Session journeys
It groups requests by IP and user agent into chronological session timelines.github.com · 8 Oct 2026
Privacy
The maker says logs are parsed in the browser and never uploaded; no account is needed.github.com · 8 Oct 2026
Browser storage
The most recently loaded log is cached in IndexedDB and restored after a page refresh.github.com · 8 Oct 2026
Export
Users can export the currently filtered results as CSV.github.com · 8 Oct 2026
Integrations and dependencies
The project loads Tailwind CSS, Chart.js, and Google Fonts from CDNs.github.com · 8 Oct 2026
Setup limit
The README says modern browsers restrict local JavaScript modules over file:// and recommends serving the folder from a local server; it also describes a Safari workaround.github.com · 8 Oct 2026
Offline use
The maker says the interface loads resources from CDNs and recommends vendoring them locally for a fully offline build.github.com · 8 Oct 2026
Purpose
LogWerk is an offline-first server log analyzer that runs in a web browser.github.com · 8 Oct 2026
Audience
It is built for developers, sysadmins, and site operators.github.com · 8 Oct 2026
Compressed logs
It can load gzip-compressed and plain rotated log files in the browser.github.com · 8 Oct 2026
Security analysis
Its Security tab detects listed attack patterns and reports suspicious IPs, 404 paths, and failed logins.github.com · 8 Oct 2026
Session analysis
It groups requests by IP address and user agent into chronological session timelines.github.com · 8 Oct 2026
Export and persistence
It exports filtered results as CSV and caches the last loaded log in browser IndexedDB for restoration after refresh.github.com · 8 Oct 2026
Languages
Its interface supports English, German, French, Spanish, Italian, and Ukrainian.github.com · 8 Oct 2026
License
The project is licensed under MIT, which permits use, copying, modification, distribution, sublicensing, and sale subject to its stated conditions.github.com · 8 Oct 2026

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Where it ranks on Specifiction

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Sources