Line Filter Pro

What is Line Filter Pro?

Line Filter Pro is a powerful text filtering tool that allows you to remove or keep lines based on specific patterns. Whether you're cleaning log files, extracting data, or processing lists, this tool makes it easy to filter text line by line.

Key Features

• Remove Lines: Delete all lines containing specific text or patterns
• Keep Lines: Keep only lines that match your criteria
• Extract Matches: Pull out just the matching portions of text
• Multiple Filters: Combine filters with AND/OR logic
• Regex Support: Use powerful regular expressions for complex patterns
• Case Options: Case-sensitive or case-insensitive matching

Common Use Cases

• Log File Analysis: Remove debug messages, extract errors
• Data Cleaning: Filter out unwanted entries from lists
• Email Extraction: Find all lines containing email addresses
• Code Cleanup: Remove comments or specific code patterns
• CSV Processing: Filter rows based on column values
• URL Filtering: Extract or remove lines with URLs

Pattern Matching Options

• Simple Text: Match exact text anywhere in the line
• Whole Words: Match complete words only (e.g., "log" won't match "login")
• Regular Expressions: Use patterns like ^ERROR: or \d+\.\d+
• Multiple Patterns: Combine filters with OR (match any) or AND (match all)

Pro Tips

• Use ^ in regex to match lines starting with a pattern
• Use $ to match patterns at the end of lines
• Enable "Remove empty lines" to clean up the output
• Combine multiple filters for complex filtering logic
• Test with a small sample before processing large files

How to Use This Tool

1. Choose your filter mode: Remove, Keep, or Extract
2. Enter your filter pattern (text or regex)
3. Configure options (case sensitivity, whole words, etc.)
4. Paste or type your text in the input area
5. Click "Apply Filter" to process
6. Copy the filtered output