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Log File Analyser

Upload a website access log to investigate server responses, frequently requested URLs and potential search engine crawler activity. Identify technical patterns using your own server data, without uploading the log to a third-party service.

WHAT TO KNOW

What server logs reveal about crawling

Server access logs can show which URLs were requested, the responses returned and patterns of crawler activity over time.

Interpret log patterns alongside crawl data and search performance. User-agent strings can be imitated, and incomplete logs may not represent all requests.

TECHNICAL SEO ANALYSIS

Understand how requests reach your website

Server access logs record requests received by a web server. Analysing these records can help identify frequently requested resources, HTTP errors, redirect responses and patterns of crawler activity.

Review the distribution of 2xx, 3xx, 4xx and 5xx responses alongside the URLs receiving requests. Unexpected errors or repeated requests to low-value URLs may warrant further investigation.

This analyser provides a descriptive overview rather than a complete crawl budget audit. Results depend on the logging configuration, available records and any caching or CDN layers in front of the origin server.

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Analyse your website access logs

Upload an Apache or Nginx-style access log to examine request activity, HTTP responses and commonly requested resources.

Supports common and combined Apache/Nginx access log formats. Maximum file size: 20 MB. Up to 100,000 non-empty log lines are processed.

Your access log is processed locally in your browser and is not submitted to Vital SEO.

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