Access Log Analyzer
Analyze nginx and Apache access logs online. See status-code errors, top IPs, busiest endpoints, bandwidth, and traffic spikes without uploading logs.
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What is Access Log Analyzer?
An Access Log Analyzer is a browser-based tool for turning nginx and Apache request logs into an operational dashboard. It parses supported log lines locally and summarizes HTTP statuses, client IPs, endpoints, response bandwidth, and request volume by minute.
Key Benefits
- Find 4xx and 5xx response patterns quickly
- Identify the clients and routes creating the most requests
- Estimate response bandwidth from the bytes field
- Investigate busy minutes around releases or incidents
- Keep sensitive logs local with no server upload
Common Use Cases
- •Performing a quick incident review before opening a full observability query
- •Checking nginx or Apache logs after a deployment
- •Finding noisy clients or unexpectedly popular API endpoints
- •Preparing a CSV slice for a support, QA, or DevOps investigation
- •Reviewing a downloaded access log on a machine without log tooling
How to Analyze Nginx or Apache Access Logs
- Paste your access log: Paste nginx or Apache combined/common log lines into the input box. One JSON access-log object per line is also supported.
- Review the summary: Check parsed requests, unique client IPs, total response bandwidth, success rate, and the number of invalid lines.
- Find hotspots: Use the status breakdown, traffic-by-minute bars, top IP table, and top endpoint table to investigate errors or load concentration.
- Export the result: Copy the readable summary for a ticket or download the parsed request records as CSV for further analysis.
Key Features
- Parse nginx and Apache combined and common access log formats line by line.
- Accept common JSON access-log records alongside standard text logs.
- Break down status codes and calculate the successful 2xx–3xx request rate.
- Rank client IPs and endpoints by request count, with endpoint bandwidth totals.
- Group timestamped requests by minute to reveal traffic concentration and spikes.
- Copy a readable report or download parsed records as CSV, with no upload.
Frequently Asked Questions
Which log formats does the analyzer support?
It supports the usual nginx and Apache combined or common access log formats, plus common JSON access-log records with fields such as remote address, method, path, status, and bytes.
Are my production logs uploaded?
No. Parsing and aggregation run entirely in your browser. The log text stays on your device unless you choose to copy or download the results yourself.
Why are some lines marked invalid?
A line is marked invalid when it does not contain a recognizable client address, request, and three-digit status in a supported format. The tool shows the line number so you can inspect custom log formats.
How are traffic spikes calculated?
Requests with recognizable nginx or Apache timestamps are grouped into one-minute buckets. The bars show request counts per bucket, so a larger bar indicates a busier minute rather than a statistical anomaly score.