Line Keeper Tool - Extract Lines Containing Specific Words
What is the Line Keeper Tool?
The Line Keeper Tool is a powerful utility that helps you filter text by keeping or removing lines that contain specific words or phrases. This simple yet effective tool can save you hours of manual work when processing large text documents, log files, code, or any other text-based content.
How to Use the Line Keeper Tool
- Paste your text into the input box (supports up to 100,000 characters)
- Enter the word or phrase you want to filter by (case sensitive)
- Choose an action: "Keep Lines" to only keep lines containing your word/phrase, or "Remove Lines" to delete lines containing your word/phrase
- View, copy, or download your filtered results
Practical Applications
- Log file analysis: Extract only error messages from server logs
- Data processing: Filter CSV or TSV files by specific values
- Content moderation: Remove lines containing inappropriate language
- Code review: Isolate lines containing specific function calls
- Research: Extract relevant information from large text documents
Why Use Our Line Keeper Tool?
Unlike many online text processing tools, our Line Keeper Tool runs entirely in your browser. This means:
- Your data never leaves your computer - complete privacy
- Instant results - no waiting for server processing
- No file size limits - process as much text as your device can handle
- No registration required - completely free with no strings attached
Tips for Effective Filtering
For best results with the Line Keeper Tool:
- Use specific search terms to avoid false positives
- Remember the search is case-sensitive ("Error" ≠ "error")
- For complex filtering, run multiple passes with different terms
- Combine with other text tools for comprehensive processing
Frequently Asked Questions
Is this tool free to use?
Yes, our Line Keeper Tool is completely free with no hidden costs or limitations.
Does the tool work on mobile devices?
Absolutely! The tool is fully responsive and works on smartphones, tablets, and desktop computers.
Is there a limit to how much text I can process?
The only limit is your device's memory. For extremely large files (millions of lines), performance may be affected.
Can I filter by multiple words at once?
The current version searches for exact matches of your entered phrase. For multiple words, you can run the tool multiple times with different search terms.
