Text Filter Tool

Text Filter Tool: Core Features and Principles

How do you quickly extract key information from messy text? The text filter tool helps you accurately screen text lines that include or exclude specific content using keyword matching and regular expressions. A text line (continuous characters separated by a line break) is the basic unit of processing, and the tool achieves efficient filtering by scanning line by line.

Why Choose Our Text Filter Tool?

• Supports advanced regular expression matching to extract complex patterns like emails, URLs, etc.
• Provides dual include/exclude modes to meet both positive filtering and reverse cleaning needs.
• Pure front-end processing ensures data privacy; text content is never uploaded to a server.

How to Use

1. Paste the text you want to process into the input box.
2. Select the include/exclude mode and enter your keywords.
3. Click the filter button to get the processed results.

Frequently Asked Questions (FAQ)

• How do I extract emails using regular expressions?
  Enter the regex: [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}
• What if the filtered results are inaccurate?Check if the case-sensitive option is enabled, or if there are syntax errors in your regular expression.

Important Notes

It is recommended to keep the text volume under 1MB per processing task. When using regex, test it on a small text sample first. For sensitive data, you can disconnect from the internet before using the tool.

Technical Notes & Tips

When processing logs, it is recommended to do a rough filter using the keyword "ERROR" first, then combine it with regex for fine filtering. Example: Use "^\[ERROR\].*database" to match database error log lines.