Key Features
- Flexible Processing Options
- Case Sensitive Detection - Choose whether "Apple" and "apple" should be treated as different lines or duplicates
- Whitespace Trimming - Automatically removes leading and trailing spaces from each line before comparison
- Empty Line Removal - Cleans up your text by eliminating blank lines
- Smart Sorting - Alphabetically sort your unique lines after duplicate removal
- Order Preservation - Keep lines in their original sequence while removing duplicates
- Real-Time Statistics
- View total line count from your input
- See the number of unique lines remaining
- Track exactly how many duplicate lines were removed
- Export & Sharing
- Export cleaned results to CSV format with line numbering
- Print-friendly output for physical documentation
- Copy results directly from the output area
- User-Friendly Interface
- Split-screen layout for easy comparison
- Example data loader for quick testing
- One-click reset to start fresh
- Instant processing with a single button click
Common Use Cases
- Data Cleaning
- Remove duplicate entries from customer lists, email addresses, or contact databases
- Clean up survey responses or form submissions
- Deduplicate product SKUs, inventory lists, or catalog entries
- Content Management
- Eliminate redundant keywords or tags
- Clean up sitemap URLs or link lists
- Remove duplicate social media handles or usernames
- Development & IT
- Deduplicate log file entries
- Clean up configuration files
- Remove duplicate IP addresses or server names
- Process and clean CSV or text-based data exports
- Academic & Research
- Remove duplicate citations or references
- Clean up participant lists or survey data
- Organize research keywords or topic lists
- General Text Processing
- Clean up copied text from multiple sources
- Organize to-do lists or task entries
- Consolidate notes and remove redundant information
How to Use
- Step 1: Input Your Data
- Paste or type your text into the left input area. Each line will be processed separately. You can input any type of text data - from simple lists to complex structured content.
- Step 2: Configure Processing Options, select your desired processing behavior:
- Enable Trim Whitespace (recommended) to ignore spacing differences
- Enable Remove Empty Lines to eliminate blank entries
- Choose Case Sensitive if capitalization matters for your data
- Select Maintain Original Order to keep your original sequence, or choose Sort Lines for alphabetical organization
- Step 3: Generate Results, Click "Generate Remove Duplicates" to process your text. The tool will:
- Split your input into individual lines
- Apply trimming and empty line removal if selected
- Compare lines based on your case sensitivity setting
- Keep only the first occurrence of each unique line
- Apply sorting if requested
- Display the clean results in the right panel
- Step 4: Review Statistics. Check the statistics panel to understand the impact:
- See how many lines were in your original input
- View the count of unique lines remaining
- Know exactly how many duplicates were removed
- Step 5: Export or Use Results
- Copy the cleaned text directly from the output area
- Export to CSV format for use in spreadsheet applications
- Print the results for offline reference
Common Questions
These options are mutually exclusive. When you check one, the other automatically unchecks. Sort Lines arranges results alphabetically, while Maintain Original Order keeps lines in the sequence they first appeared.
When unchecked (default), "Apple", "APPLE", and "apple" are treated as duplicates - only one will remain. When checked, each unique capitalization is kept as a separate line.
It removes spaces, tabs, and other whitespace from the beginning and end of each line before comparison. This means " Apple " and "Apple" would be treated as duplicates. This is enabled by default for best results.
Yes, empty lines in your original input are counted in "Total Lines". If "Remove Empty Lines" is checked, they won't appear in the results and will contribute to the "Duplicates Removed" count.
Yes, the tool handles text processing efficiently in your browser. However, extremely large files (millions of lines) may take a few moments to process depending on your device's performance.
The CSV export creates a two-column file with "Line Number" and "Content". Each unique line is numbered sequentially and properly escaped for compatibility with Excel, Google Sheets, and other spreadsheet applications.
No, all processing happens locally in your browser. Your data is never uploaded to any server, ensuring complete privacy and security.
Special characters, punctuation, numbers, and symbols are preserved exactly as entered. The tool only focuses on removing duplicate lines based on your selected options.
The original input remains in the left panel unchanged. You can modify options and click "Generate Remove Duplicates" again. Use the "Reset" button to clear all data and return to default settings.
It loads sample text with intentional duplicates in various formats (different cases, spacing, etc.) so you can test different processing options and see how they affect the results.