Remove Lines Containing/Not Containing
Advanced Text Filter Tool
Filter text content by including or excluding specific keywords, with support for regex patterns and multiple filtering options.
Filtered Result
What is the Remove Lines Containing/Not Containing Tool?
The Remove Lines Containing/Not Containing Tool is a powerful, web-based text filtering utility designed to refine and manipulate large volumes of text with precision. Whether you’re a writer, developer, data analyst, or content creator, this tool allows you to filter lines based on specific keywords, patterns, or conditions, ensuring your content remains structured, clear, and professional.
With advanced features like case sensitivity, regular expressions, trimming options, and real-time statistics, this tool is an essential resource for those dealing with logs, datasets, code snippets, or structured text documents. If you often work with JSON data, you might also find the JSON Encode Decode Tool very useful to prepare your text before filtering.
Key Features of the Text Filtering Tool
🔹 1. Multiple Filtering Options
This tool offers various filtering methods to match different use cases:
| Filter Type | Function | Example Usage |
|---|---|---|
| Contains | Retains lines that include the specified keyword(s). | Extract all lines containing “error”. |
| Does Not Contain | Removes lines containing the specified keyword(s). | Exclude all lines containing “timestamp”. |
| Starts With | Filters lines that begin with a given word or phrase. | Find headings that start with “#”. |
| Ends With | Filters lines that end with a given word or phrase. | Identify sentences that end with “done”. |
| Regular Expression (Regex) | Enables advanced pattern matching for complex filtering. | Extract all email addresses using regex. |
If you handle CSV data along with text, the CSV to Table Converter can help you visualize structured data before filtering.
🔹 2. Case Sensitivity Toggle
Enable Case Sensitive Mode to distinguish between uppercase and lowercase characters, ensuring exact matches.
🔹 3. Additional Text Processing Options
Ignore Empty Lines – Skips blank lines when filtering.
Trim Lines – Removes leading and trailing spaces from each line.
Highlight Matches – Visually highlights filtered text for easy identification.
For further text manipulation, you may want to try the Advance Text Replacer or the Remove Extra Spaces Tool to clean your input before filtering.
🔹 4. Efficient Text Management
Process Text – Apply selected filters instantly.
Copy Result – Copy the formatted output to your clipboard.
Clear All – Reset input and output fields.
Undo – Revert to the previous state before filtering.
Download Output – Save the processed text as a .TXT file for offline use.
🔹 5. Real-Time Statistics
This tool provides essential live metrics to help track changes:
✅ Character Count
✅ Line Count
✅ Word Count
How to Use the Remove Lines Containing/Not Containing Tool?
Step 1: Input Your Text
Paste or type your text into the Input Text field.
For audio or video transcriptions, the Text to Speech tool might also be handy to listen to your text content.
Step 2: Select Your Filter Type
Choose from the available filtering options:
Contains
Does Not Contain
Starts With
Ends With
Regular Expression (Regex)
Step 3: Configure Additional Options
Enable/disable Case Sensitivity, Ignore Empty Lines, Trim Lines, or Highlight Matches as needed.
Step 4: Apply the Filter
Click Process Text to filter the input and generate the refined output.
Step 5: Manage the Output
Copy Result – Copy the filtered text for further use.
Download Output – Save the file in .TXT format.
Clear All – Reset and start over.
Why Use This Advanced Text Filtering Tool?
✅ Saves Time – Quickly processes large amounts of text without manual filtering.
✅ Enhances Readability – Removes unnecessary or redundant lines for clean content.
✅ Supports Advanced Regex – Perfect for developers and analysts working with complex patterns.
✅ User-Friendly Interface – Simple, intuitive design with instant results.
✅ No Installation Needed – Completely browser-based and accessible on any device.
✅ Free & Secure – Your text is never stored; all processing happens locally in your browser.
If you want to secure your text or generate encrypted messages before filtering, consider the Message Encryption Decryption tool.
Frequently Asked Questions (FAQ)
❓ What types of text can I filter with this tool?
You can filter any plain text, including code snippets, error logs, articles, data sets, and more.
❓ How does the “Regular Expression” option work?
The Regex filter allows you to use pattern-based matching. For example, to extract all lines starting with an uppercase letter, use:
To find email addresses, use:
❓ Can I filter multiple keywords at once?
Currently, the tool processes one keyword or pattern at a time. To filter multiple words, you can:
Repeat the process for each keyword, OR
Use Regex with alternation ( | ), such as:
(This filters lines containing “error”, “warning”, or “failed” in a single operation.)
❓ Is there a limit to the text size I can process?
The tool can handle large text inputs efficiently, but extremely large files may affect browser performance.
❓ Does the tool store or share my text?
No. All text processing happens within your browser, ensuring 100% privacy and security.
Example Use Cases
| Scenario | Filter Type | Keyword/Pattern | Result |
|---|---|---|---|
| Remove empty lines | Ignore Empty Lines | N/A | Text without blank lines |
| Extract error logs | Contains | "error" | Keeps lines with “error” |
| Exclude metadata | Does Not Contain | "timestamp" | Removes lines with “timestamp” |
| Find markdown headings | Starts With | "#" | Extracts all markdown headings |
| Validate emails | Regular Expression | \b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b | Extracts all email addresses |
For additional content structuring, tools like the Advanced Robots Txt Generator and HTML Encoder Decoder might help optimize your website’s SEO and text presentation.
Why Choose This Online Text Filtering Tool?
🔹 Versatile – Useful for writers, developers, and data analysts.
🔹 Precision Filtering – Advanced options like regex and case sensitivity ensure accuracy.
🔹 Web-Based & Instant – No downloads or installations required.
🔹 SEO-Friendly Content – Cleans and structures text for better search engine optimization.
Start Filtering Your Text Now! 🚀
Enhance your text processing workflow with fast, efficient, and professional filtering.
💡 Try the Remove Lines Containing/Not Containing Tool today – it’s 100% free and effortless!
📋 [Try the Tool Now] | 📥 [Copy Result] | 📄 [Download Output]