Filter unwanted lines from documents using text patterns, regex, or custom rules. Clean logs, process data, and organize content faster.
Paste your text below. Configure filter options and patterns to remove matching lines.
Results appear here after filtering.
Live metrics showing filtering results.
Line filtering tools remove unwanted lines from text documents based on search patterns. You define what to find, and the tool deletes matching lines instantly. This speeds up log cleanup, data processing, and content organization.
Pattern matching supports simple text searches and regular expressions. Text mode finds exact strings within lines. Regex mode handles complex patterns like email addresses, timestamps, or structured data. You can combine multiple patterns to remove different line types in one pass.
Case sensitivity controls whether uppercase and lowercase matter. Whole line matching requires the entire line to match the pattern. Invert matching keeps lines that match instead of removing them, useful for extracting specific content.
Processing options clean up results automatically. Trimming whitespace removes leading and trailing spaces before matching. Empty line removal deletes blank lines left after filtering. Line number display shows original positions for reference.
Real-time filtering updates results as you type. The tool processes thousands of lines in milliseconds. Statistics show original counts, remaining lines, removal percentages, and processing speed. Preview sections highlight removed lines for verification.
Common use cases include log file cleanup, removing debug statements from code, filtering error messages, extracting specific data types, cleaning CSV exports, and organizing structured text. The tool handles large files efficiently without slowing down your browser.
Paste or type your text into the input area. The tool splits content into individual lines for processing.
Each line is checked against your search patterns. Matching lines are flagged for removal based on your settings.
Remaining lines are assembled into clean output. Statistics show removal counts and processing time.
Remove error messages, debug lines, and timestamp entries from log files for cleaner analysis.
Filter CSV exports, remove header rows, and clean structured data before importing into systems.
Extract specific sections, remove comments, and organize text documents for better readability.
Enter text strings or regex patterns that identify lines to remove. Multiple patterns work together.
Set case sensitivity, whole line matching, and processing rules to match your needs.
Check statistics and preview removed lines to verify filtering accuracy before copying.
Answers to common questions about removing lines containing text patterns.
Add multiple pattern rows using the Add Pattern button. Lines matching any pattern will be removed. Each pattern can use different matching types like text, regex, starts with, or ends with.
Text matching finds exact strings within lines. Regex matching supports pattern syntax like ^ for line start, $ for line end, and character classes for flexible searches.
Enable the Invert match option. This keeps lines that match your patterns and removes lines that do not match.
When case sensitive is enabled, uppercase and lowercase must match exactly. When disabled, Error matches error, ERROR, and ErRoR.
The Remove empty lines option deletes blank lines after filtering. The Preserve blank lines option keeps intentional blank lines in the output.
The tool handles files with thousands of lines efficiently. Processing happens in your browser, so there are no file size limits from server uploads.
