Duplicate Line Remover
Efficiently remove duplicate lines from your text with customizable options. Perfect for cleaning lists, logs, and datasets.
0 lines
Processed results will appear here...
Original: 0 lines
Processed: 0 lines
Duplicates removed: 0
Empty lines removed: 0
How to Use
- Paste your text in the input area. This can be any text containing duplicate lines.
- Adjust the processing options (case sensitivity, trimming, empty lines, sorting, or ignoring prefixes).
- Click "Process Text" to remove duplicates based on your options.
- Review the results in the output area and check the statistics panel.
- Copy or download the cleaned text, or clear to start over.
Key Features
- Removes duplicate lines with customizable comparison options.
- Trims whitespace and removes empty lines.
- Sorts lines alphabetically.
- Ignores lines with specified prefixes (e.g., comments).
- Provides detailed statistics on processing results.
Frequently Asked Questions
What's the difference between case-sensitive and case-insensitive comparison?
When case-sensitive comparison is enabled, lines like "Example" and "example" are treated as different. When disabled, they are considered duplicates, keeping the first occurrence.
Does trimming whitespace affect the results?
Yes, trimming enabled means lines differing only in leading/trailing spaces are considered duplicates (e.g., " hello" and "hello " are the same).
Can I process very large files with this tool?
The tool runs in your browser and handles tens of thousands of lines efficiently. Performance for very large files (100,000+ lines) depends on your device.
What happens to the original order of lines?
The tool preserves the first occurrence order unless sorting is enabled, which sorts alphabetically. Use "Ignore prefix" to skip lines like comments.
Is my data secure when using this tool?
Yes, all processing occurs in your browser, and no data is sent to any server. You can disconnect from the internet after loading to verify.