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SEO Skill Server Log Analyzer

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What SEO Skill Server Log Analyzer is

SEO Skill Server Log Analyzer is a free tool for finding crawler activity in server access logs. Its browser analyzer accepts combined Apache or NGINX logs and JSONL or NDJSON exports up to 250 MB, and identifies activity associated with Googlebot, Bingbot, and AI crawlers. It groups requests by crawler family, URL path, and HTTP status, removes query strings from paths, and shows the first and last valid request dates found in the file.

The browser processes raw logs locally; the maker says they are not uploaded or retained as a searchable copy. CSV exports provide crawler summaries, paths, errors, and status codes, but exclude raw requests and full user-agent strings. The same parser can run from a terminal and return JSON or a selected CSV table, for use by an agent, script, spreadsheet, or another analysis tool. A user-agent match indicates what a request claimed to be, not which company sent it. Malformed rows or processing limits can lead to partial results, so missing crawler activity in a partial result is unknown. The documented command accepts explicit limits for rows, paths, and returned details. SEO Skill identifies itself as a joint by Ian Nuttall.

Who it suits

This tool suits people with combined or JSONL access logs who need evidence of server requests attributed to search or AI crawlers. Its terminal workflow also suits anyone who needs repeatable log analysis for an agent or script.

What it does well

  • Free browser-based analysis of supported server access logs.
  • Processes raw logs in the browser without uploading them, according to the maker.
  • Groups crawler activity by family, URL path, and HTTP status.
  • Exports crawler summaries, paths, errors, and status codes as CSV.
  • The parser can return JSON or a selected CSV table from the terminal.

What to know first

  • Input files are limited to 250 MB.
  • CSV exports omit raw requests and full user-agent strings.
  • A user-agent match does not establish which company sent the request.
  • Malformed rows or processing limits can produce partial results.

Limits

The free tool accepts files up to 250 MB. CSV exports contain aggregates rather than raw requests or full user-agent strings, and malformed rows or processing limits can yield partial results.

Getting started

  1. Visit the SEO Skill Server Log Analyzer page.
  2. Upload a combined Apache or NGINX log, or a JSONL or NDJSON export up to 250 MB.
  3. Review crawler groups, URL paths, HTTP statuses, and valid request dates.
  4. Export a crawler summary, paths, errors, or status codes as CSV.
  5. Run the same parser from a terminal if you need JSON or a selected CSV table.

Verdict

Choose SEO Skill Server Log Analyzer when you have supported access logs and want grouped crawler activity without sending raw logs to a server, as described by the maker. The terminal workflow adds options for repeatable analysis and structured output. Look elsewhere if you need exports containing individual raw requests or full user-agent strings.

Questions

Is SEO Skill Server Log Analyzer free?

Yes. It is listed as free, with a free plan.

Which log formats can I use?

It accepts combined Apache or NGINX logs and JSONL or NDJSON exports, up to 250 MB.

Does the browser upload my raw log?

The analyzer says it processes logs in the browser and does not upload them or keep a searchable copy of raw requests.

What can I export?

CSV exports cover crawler summaries, paths, errors, and status codes. They omit raw requests and full user-agent strings.

Can I run it from a terminal?

Yes. The same parser can return JSON or a selected CSV table; JSON output is described as useful for an agent or script.

Do crawler matches prove which company sent a request?

No. A matching user-agent string reports what the request claimed to be, not which company sent it.

Facts from SEO Skill Server Log Analyzer's own pages

Accepted logs
It opens combined Apache or NGINX logs and JSONL or NDJSON exports, with a stated upload limit of 250 MB. · seoskill.dev, 8 Oct 2026
Agent and script use
The maker says JSON output can be used by an agent or script. · seoskill.dev, 8 Oct 2026
Analysis limits
The documented command accepts explicit row, path, and returned-detail limits for log analysis. · seoskill.dev, 8 Oct 2026
Crawler identity caveat
A matching user-agent string reports what a request claimed to be and does not prove which company sent it. · seoskill.dev, 8 Oct 2026
Crawler summaries
It groups requests by crawler family, URL path, and HTTP status, removes query strings, and shows the first and last valid request dates. · seoskill.dev, 8 Oct 2026
CSV exports
It exports crawler summary, crawler paths, crawler errors, and status codes; exports omit raw requests and full user-agent strings. · seoskill.dev, 8 Oct 2026
Date range
It shows the first and last valid request dates found in the file. · seoskill.dev, 8 Oct 2026
Export contents
CSV exports contain crawler aggregates and omit raw requests and full user-agent strings. · seoskill.dev, 8 Oct 2026
Grouping
The analyzer groups requests by crawler family, URL path, and HTTP status, and removes query strings from paths. · seoskill.dev, 8 Oct 2026
Input caveat
User-agent matches show what a request claimed to be and do not prove which company sent it. · seoskill.dev, 8 Oct 2026
Integrations
The terminal command's JSON output is described as useful for an agent or script, and CSV output can be used in a spreadsheet or another analysis tool. · seoskill.dev, 8 Oct 2026
Intended users
The report is for people who have a combined or JSONL access log and need evidence of real server requests. · seoskill.dev, 8 Oct 2026
Local processing
The raw log is processed in the browser and is not uploaded or kept as a searchable copy. · seoskill.dev, 8 Oct 2026
Maker
SEO Skill identifies itself as a joint by Ian Nuttall; the opened pages do not state a headquarters or founding date. · seoskill.dev, 8 Oct 2026
Partial results
Malformed rows or processing limits can produce partial results, and missing crawler activity in those results should be treated as unknown. · seoskill.dev, 8 Oct 2026
Privacy
The analyzer processes logs in the browser and says it does not upload logs or keep a searchable copy of raw requests. · seoskill.dev, 8 Oct 2026
Purpose
The browser analyzer finds Googlebot, Bingbot, and AI crawler activity in server access logs. · seoskill.dev, 8 Oct 2026
Supported files
It accepts combined Apache or NGINX logs and JSONL exports up to 250 MB. · seoskill.dev, 8 Oct 2026
Terminal use
The same parser can be run from the terminal and return JSON or a selected CSV table. · seoskill.dev, 8 Oct 2026
Who it is for
The maker describes the terminal workflow as useful for an agent or script that needs repeatable server log analysis. · seoskill.dev, 8 Oct 2026

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