Remove Lines Containing
A powerful tool to remove lines containing specific text or patterns from your content. Perfect for cleaning logs, filtering data files, and processing text with advanced pattern matching options.
Matching Options
Advanced Options
Features
- Case sensitive/insensitive matching
- Whole word matching
- Regular expression support
- Invert match (keep matching lines)
- Preserves empty lines
- Unicode support
- Handles special characters
- Undo/redo support
Instructions
- Paste or type text in the editor
- Enter the text to match
- Select matching options
- Click "Remove Lines"
- Copy the filtered result
Interesting History
The concept of pattern matching and line filtering dates back to the early days of Unix in the 1970s. The 'grep' command, created by Ken Thompson, revolutionized text processing by introducing regular expressions for pattern matching. The name 'grep' comes from the ed command g/re/p (globally search for a regular expression and print). This fundamental concept has evolved into modern text processing tools, making complex pattern matching accessible to everyone.
Frequently Asked Questions
What is the Remove Lines Containing tool?
It's a specialized text processing tool that removes lines containing specific text or patterns from your content, with support for case sensitivity, regular expressions, and inverse matching.
How does pattern matching work?
The tool supports multiple pattern matching modes: simple text matching, whole word matching, and regular expressions for advanced pattern matching needs.
What is inverse matching?
Inverse matching (invert match) keeps lines that match the pattern instead of removing them, effectively inverting the tool's behavior.
Can it handle large files?
Yes, the tool is optimized for performance and can handle large text files efficiently, processing them line by line to maintain good performance.
Does it support regular expressions?
Yes, you can use regular expressions (regex) for complex pattern matching needs, supporting all standard regex features.
How are empty lines handled?
Empty lines are preserved by default but can be filtered using appropriate patterns or regular expressions if needed.
Is the tool case sensitive?
Case sensitivity is optional. You can toggle between case-sensitive and case-insensitive matching based on your needs.
What are common use cases?
Common uses include cleaning log files, filtering data exports, removing unwanted entries from lists, and processing text data for analysis.
Can I undo changes?
Yes, the tool includes undo/redo functionality to help you experiment with different filtering options safely.
Is my text data secure?
Yes, all processing is done locally in your browser. No data is sent to any server or stored anywhere.