- Paste Your Text: Paste your text with multiple lines (and potential duplicates) into the "Input Text" box.
- Configure Options: Choose how you want duplicates to be identified:
- Case Sensitive: Check this if "Apple" and "apple" should be treated as different lines. Uncheck if they should be treated as duplicates.
- Trim Whitespace: Check this to ignore leading/trailing spaces when comparing lines (e.g., " text" and "text " will be seen as duplicates).
- Remove Duplicates: Click the "Remove Duplicates" button. The tool will process your text and display only the unique lines in the "Unique Lines (Output)" box.
- Check Statistics: See how many lines were removed and how many unique lines remain, displayed in the statistics bar.
- Copy and Clear: Use "Copy Result" to extract the unique lines, or "Clear All" to reset both areas of text.
Duplicate Line Remover is a simple yet easy-to-use online tool that helps you quickly find and remove duplicate lines in your text. Perfect for cleaning up data or organizing lists, leaving you with only the unique lines you need.
-
Efficient Text Cleaning:
- This tool processes your input text line by line, comparing each with previously found lines to ensure that only the first occurrence of any unique line is retained in the final output.
-
Customizable Matching:
- You have control over how duplicates are detected:
- Case Sensitivity: Decide whether capitalization is important (e.g., treat "Line" and "line" as different or the same).
- Whitespace Trimming: Choose to ignore extra spaces at the beginning or end of lines, ensuring that "Item" and "Item" are recognized as the same.
- You have control over how duplicates are detected:
-
Clear Statistics:
- After processing, the tool provides immediate feedback, showing you exactly how many duplicate lines were removed and the total count of unique lines remaining.
How does the tool define a "duplicate line"?
A "duplicate line" is any line that is identical to a line that already appears in the text, based on your selected "Case Sensitive" and "Trim Whitespace" options. The tool keeps the first instance it encounters and discards subsequent matches.
Can I process very large text files with this tool?
While the tool processes text client-side (in your browser), there are practical limitations based on your device's memory and browser performance. For very large files (e.g., millions of lines), you may experience slowdowns or browser unresponsiveness. This works best for medium-sized text.
What if I have blank lines? Does it remove them?
The tool treats blank lines (lines with only spaces or completely empty lines) as duplicates of each other. If you have many blank lines, it will usually only leave one blank line in the output, depending on the "Trim Whitespace" setting. If you trim the whitespace, a line with only spaces will be treated as the same as a completely empty line.
Is my data private and secure?
Yes! This tool works entirely within your web browser. Your text is processed locally and is never sent to any server. This ensures that your data remains private and secure.
