Question 1

What log formats are supported?

Accepted Answer

The tool supports Apache Common Log Format, Apache Combined Log Format, Nginx default log format, JSON (one object per line), and CSV (comma-separated with a header row). You can convert between any two of these formats.

Question 2

How does Apache log parsing work?

Accepted Answer

Apache Common logs are parsed with a standard regex that extracts IP, user, timestamp, request line, HTTP status, and response size. Apache Combined adds the Referer and User-Agent fields. Lines that do not match the pattern are counted as failed.

Question 3

Can I convert JSON logs to CSV?

Accepted Answer

Yes. JSON lines (one JSON object per line) are parsed and the keys of the first object become the CSV header row. All subsequent objects are written as CSV rows. Fields not present in a row are left blank.

Question 4

Why are some lines marked as failed?

Accepted Answer

A line fails when it does not match the expected pattern for the selected input format. For example, comment lines, blank lines, or lines from a different log format will fail. The stats bar shows how many lines succeeded and how many failed.

Question 5

Is my log data sent to a server?

Accepted Answer

No. All parsing and conversion happens entirely in your browser using JavaScript. Your log data never leaves your device, which is important for logs that may contain sensitive IP addresses or user information.

Log Format Converter

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