Are my files uploaded?

No. Files are opened and processed by your browser on this device. Nothing is sent to a server, so it works with private documents and even offline once the page has loaded.

Which formats are understood?

Nginx and Apache access logs, one-JSON-object-per-line logs, and plain lines with a date and a level such as ERROR or WARN.

Nightroll

Free Log File Viewer

Drop a log file to search it and see what happened when.

Choose a log file or drop it hereNginx, Apache, JSON lines or plain logs. The file stays on this device.

The first 1,000 matching lines are listed; the chart and tops count them all.

How to make a log analysis

Drop a log file (Nginx, Apache, JSON lines or plain text) or paste one.
Search and filter by status code or level.
Read the chart over time and the top paths and IP addresses.

Frequently asked questions

Are my files uploaded?: No. Files are opened and processed by your browser on this device. Nothing is sent to a server, so it works with private documents and even offline once the page has loaded.
Which formats are understood?: Nginx and Apache access logs, one-JSON-object-per-line logs, and plain lines with a date and a level such as ERROR or WARN.