# Log File RegExp Filter

> Upload local log files and filter them in real-time using regular expressions or keywords in a color-coded terminal console.

- Open in browser: https://pockettoolbox.org/en/log-filter
- Runs entirely in your browser; files and input are never uploaded.

## How it works

A fast, fully client-side RegExp log file analyzer.

The tool reads log files locally via the HTML5 FileReader. Users can define RegExp patterns. The JS engine splits text into lines, tests each against the pattern, and outputs hits. Common log levels (Error, Warning, Info, Debug) are automatically highlighted in different colors.

Reads log files line-by-line and applies regular expressions. Matches are filtered in real time with color-coded log levels rendered efficiently on screen.

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PocketToolbox (https://pockettoolbox.org/en)