Log File Analyzer
Analyze large log files with client-side parsing and filtering.
Drop your log file here
or click to browse (.log, .txt)
Log File Analyzer & Viewer
Debugging a production issue at 2 AM usually starts with someone saying 'check the logs.' But when you're staring at a 50 MB log file in Notepad, searching for that one ERROR line among thousands of INFO messages, you realize you need a better tool.
Our Log File Analyzer lets you drag-and-drop any text-based log file and instantly parse it into a searchable, filterable table. It auto-detects common log formats (timestamp + level + message) and color-codes entries by severity: red for ERROR, yellow for WARN, blue for INFO, and gray for DEBUG.
The killer feature is the real-time filter bar: type a keyword, select log levels to include or exclude, and narrow down thousands of lines to just the ones that matter. Everything runs client-side, so even your most sensitive production logs never leave your computer. We built this after spending too many late nights grep-ing through Kubernetes pod logs — now we just drop the file here and find the bug in minutes instead of hours.
How to use
- 1
Drag and drop a .log or .txt file into the upload area (or click to browse).
- 2
The tool auto-parses lines and highlights log levels (ERROR, WARN, INFO, DEBUG).
- 3
Use the search bar to find specific keywords (e.g., 'NullPointerException').
- 4
Toggle log level filters to show only ERRORs, only WARNs, etc.
FAQ
Any text-based log file works. The tool is optimized for standard formats like 'TIMESTAMP [LEVEL] message' but will still display non-standard formats as raw lines.
Since parsing happens in your browser's memory, files up to ~100 MB work well on modern machines. Extremely large files (500 MB+) may cause slower rendering.