Log Viewer & Formatter
Raw Logs
Drop file to load
Processed locally in browser
What is the Log Viewer?
The Log Viewer is a free developer tool designed to parse, format, and highlight raw application logs. It makes it easier to read dense server output by applying syntax highlighting to severity levels, timestamps, and JSON payloads embedded within the logs.
Why use an offline log viewer?
Application logs often contain sensitive information, including user IDs, internal IP addresses, query parameters, and occasionally leaked API keys. Uploading these logs to a random online tool is a massive security risk. Our Log Viewer processes everything entirely in your local browser memory, guaranteeing absolute privacy and security for your infrastructure data.
How to Use This Tool
- Paste your raw log output into the input pane.
- The viewer will automatically detect standard log patterns.
- Errors and warnings will be color-coded for quick identification.
Frequently Asked Questions
Are my server logs safe to view here?▼
Yes. All log parsing and colorization happens locally in your browser. We never upload your logs to any server, keeping your infrastructure details and sensitive data completely private.
What log formats does it support?▼
It supports standard text-based logs, highlighting common keywords like ERROR, WARN, INFO, DEBUG, and extracting timestamps automatically.
Can it handle large log files?▼
Because it runs in the browser, performance depends on your device's RAM. It is highly optimized and can handle tens of thousands of lines smoothly.