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Free to use, no account

Access Log Analyzer

Paste or select an Nginx/Apache access log to count valid requests, spot invalid lines, filter traffic and export a CSV summary. Processing stays in this tab.

Logs may contain personal data such as IP addresses, URLs or user agents. Use only data you are allowed to process. Nothing is uploaded; avoid shared devices for sensitive logs.

Free local processing: up to 5 MiB and 20,000 non-empty lines per analysis. Large logs can use more memory; a computer is recommended.

Supports NCSA Common/Combined lines (host ident auth [date] "request" status bytes, optionally followed by referer and user agent). One request per line.

How do I analyze an access log?

Paste log lines or select a local .log or .txt file, then choose Analyze. The tool supports NCSA Common and Combined access-log lines; it does not fetch server logs for you.

Frequently asked questions

How do I analyze an access log?

Paste log lines or select a local .log or .txt file, then choose Analyze. The tool supports NCSA Common and Combined access-log lines; it does not fetch server logs for you.

Are my access logs uploaded?

No. The file is read by your browser and analyzed in this tab. It is not sent to UsefulVerse or saved by this tool. Clear the page when finished, especially on a shared device.

Which access-log formats are supported?

The analyzer accepts NCSA Common and Combined lines with a bracketed date, quoted request, three-digit status and byte count. Combined referer and user-agent fields are optional. Other layouts, JSON logs and web-server error logs are not supported.

Why are some log lines marked invalid?

A line is counted as invalid when it does not match the supported NCSA structure or contains an invalid date, request, status or byte count. Invalid lines are counted, not repaired or included in the request totals.

Can I analyze a whole server or stream live logs?

No. This browser tool analyzes only text you paste or choose locally, up to 5 MiB and 20,000 non-empty lines. It does not connect to a server, tail files, query a database or process logs in the cloud.