Access Log Analyzer

About this tool

Paste access log lines and get a quick summary: total requests, a breakdown of HTTP status codes, the busiest IP addresses, and the most-requested URLs.

Example

Input: (many log lines)

Output: Total: 1240, 200: 1100, 404: 80...

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste one or more access log lines into the input box.
2. Make sure each line includes an IP address, a request URL, and an HTTP status code.
3. Click the analyze button to scan the logs.
4. Read the summary for total requests, status code breakdown, busiest IPs, and most-requested URLs.

Step by step, what happens

1. The tool reads each pasted line and treats it as one log entry when the format looks like an access log.
2. It extracts the IP address, requested URL, and HTTP status code from each entry.
3. It counts how many requests were pasted in total.
4. It groups status codes, then ranks the IP addresses and URLs that appear most often.
5. It shows the results in a quick summary so you can spot traffic patterns and common responses.

Worked example

Here is a small access log sample that shows a mix of successful and missing page requests from a couple of IP addresses.

Input: 192.168.0.10 - - [10/Oct/2024:13:55:36 +0000] "GET /index.html HTTP/1.1" 200 512 192.168.0.10 - - [10/Oct/2024:13:55:37 +0000] "GET /about HTTP/1.1" 404 231 10.0.0.5 - - [10/Oct/2024:13:55:38 +0000] "GET /index.html HTTP/1.1" 200 512

1. The tool counts 3 total requests because there are 3 log lines.
2. It groups the status codes into 200 appearing 2 times and 404 appearing 1 time.
3. It ranks the IP addresses and shows 192.168.0.10 with 2 requests and 10.0.0.5 with 1 request.
4. It counts the URLs and shows /index.html as the most requested URL with 2 hits, followed by /about with 1 hit.

Tips and common mistakes

• Paste raw log lines, not wrapped text from a report, so each request stays on its own line.
• If the tool misses a line, check that the line actually contains an IP address, a URL, and a status code.
• Mixed log formats can produce incomplete results, so keep the input to access log lines from the same source when possible.
• If you want a clean count of one endpoint, include only the lines for that time range or service.

Frequently asked questions