Extract a Sublist by Range

Looking for a simple way to Extract a Sublist by Range from your text lists? This browser-based tool lets you pull specific sections from longer lists without any downloads or complicated software. Just paste your list, set your range, and grab exactly what you need. Perfect for breaking down large datasets, pulling sample entries, or isolating specific sections of documentation lists.

How to Use:

1. Paste your text list into the input area, with each item on its own line. Additionally, the tool automatically loads with a sample project documentation list to show you how it works.
2. Choose your extraction settings using the toggle switches. First, Skip empty lines removes any blank entries from your list before extraction. Then, Trim whitespace cleans up extra spaces around each line. Finally, Include line numbers adds numbered prefixes to your extracted items.
3. Set your range parameters using the number inputs. Initially, Start line tells the tool where to begin extracting, while End line sets where to stop. Furthermore, both fields automatically adjust to stay within your list’s bounds.
4. Select your extraction mode from the radio buttons. For instance, Line range pulls items between your start and end numbers. Alternatively, First N lines grabs the beginning items using just the start number. Similarly, Last N lines takes items from the end, and Middle section automatically extracts the central quarter of your list.
5. Click Extract to process your list and see the results instantly. As a result, the output updates in real-time as you change settings, and the tool shows exactly how many items got extracted.
6. Copy or export your results using the buttons below the output area. Notably, the copy function gives you temporary “Copied!” feedback so you know it worked.

What Extract a Sublist by Range can do:

This tool transforms how you work with long text lists by letting you grab exactly the sections you need. Instead of scrolling through hundreds of entries looking for specific ranges, you can instantly extract lines 50 through 75, or grab just the first 20 items from a massive dataset.

Range Selection Methods:

The line range mode works great when you know exactly which section you want. For example, maybe you’ve got a list of 200 customer names and need items 45 through 62 for a specific analysis. In this case, just set those numbers and you’re done. Meanwhile, the first N lines mode comes in handy for creating sample datasets or previews. Specifically, if you’ve got a thousand-item product catalog but only need the first 25 entries for testing, this mode saves tons of time.

Last N lines mode proves useful when you’re working with logs or chronologically ordered data where the newest entries matter most. Consequently, you can pull the most recent 30 transactions, the latest 15 error messages, or the final 50 items from any sequential list. On the other hand, the middle section mode automatically finds the central quarter of your list, which is perfect for getting representative samples from large datasets without bias toward the beginning or end.

Advanced Features:

The skip empty lines feature keeps your extracted sections clean by removing blank entries that might mess up your count. This matters a lot when you’re extracting specific ranges because empty lines can throw off your numbering. Similarly, trim whitespace cleans up formatting issues that creep into lists, especially when you’re copying from different sources.

Include line numbers adds useful context to your extracted sections. Instead of getting a disconnected list of items, you’ll see exactly where each entry came from in your original list. Therefore, this helps when you need to reference back to the source or when you’re working with multiple people who need to know the original positions.

Data Security and Processing:

The tool handles everything client-side, so your data never leaves your browser. As a result, you can work with sensitive information like customer lists, internal documentation, or proprietary data without worrying about uploads or server storage. Additionally, import functionality accepts various text formats including CSV, TSV, and plain text files, making it easy to work with exports from other systems.

Real-time processing means you see changes instantly as you adjust your settings. For instance, want to see what the first 10 items look like versus the first 15? Just change the number and watch the output update immediately. This instant feedback helps you find the perfect range without multiple clicks or page reloads.

Example:

Let’s say you’ve got a project task list with 15 items and you need to extract items 4 through 8 for this week’s sprint planning:

Input:

Project Alpha Documentation
System Requirements Analysis
Database Schema Design
User Interface Mockups
API Endpoint Configuration
Authentication Implementation
Payment Gateway Integration
Email Notification System
Error Handling Procedures
Security Audit Checklist
Performance Optimization
Testing Strategy Document
Deployment Configuration
Monitoring Setup Guide
Backup Recovery Plan

Settings: Line range mode, start line 4, end line 8, with line numbers included

Output:

4. User Interface Mockups
5. API Endpoint Configuration
6. Authentication Implementation
7. Payment Gateway Integration
8. Email Notification System

This gives you exactly the section you need with clear numbering that references back to the original list.

Extract a Sublist by Range Table:

This comparison table shows different extraction scenarios and their outputs, demonstrating how the tool handles various range selections and modes across the same source list.

Common Use Cases:

Data analysts use this tool to create representative samples from large datasets without manually selecting entries. Rather than scrolling through thousands of records, they can extract systematic ranges for testing or analysis. Meanwhile, software developers find it useful for isolating specific sections of configuration files, API responses, or log entries when debugging or documenting systems. Furthermore, content managers extract specific ranges from product catalogs, customer lists, or content inventories when creating focused reports or targeted campaigns. Overall, the tool works particularly well for breaking down large imports into manageable chunks that fit processing limits or display requirements.