Remove Duplicate Lines
Clean up your text by removing duplicate lines with this free online tool.
Input Text
0 lines, 0 characters
Options
Result
0 lines, 0 characters
0 duplicates removed
How to Use the Duplicate Line Remover
- Input your text - Paste or type the text containing duplicate lines in the input field.
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Configure options:
- Case sensitive comparison: When checked, "Line" and "line" are treated as different lines.
- Trim whitespace: When checked, leading and trailing spaces are ignored when comparing lines.
- Ignore empty lines: When checked, blank lines are not considered when removing duplicates.
- Keep first occurrence: When checked, the first occurrence of a duplicate line is kept. When unchecked, the last occurrence is kept.
- Click "Remove Duplicates" - Process the text to remove duplicate lines based on your settings.
- View and copy the result - The processed text appears in the output field. Click "Copy to Clipboard" to copy the result.
This tool is useful for cleaning up data lists, removing redundant entries from logs, deduplicating code snippets, or preparing text for further processing. It works with any text containing line breaks.
Common Use Cases
Data Cleaning
- Remove duplicate entries from lists of names, emails, or IDs
- Clean up exported data from spreadsheets or databases
- Deduplicate log files while preserving chronological order
Content Preparation
- Remove duplicate keywords or tags
- Clean up content before importing to another system
- Prepare unique lists for documentation or reports
Code and Configuration
- Remove duplicate import statements or dependencies
- Clean up configuration files with redundant entries
- Deduplicate lists of URLs, paths, or references
Text Analysis
- Identify unique lines in a document
- Prepare text for frequency analysis
- Clean up survey responses or feedback data