0
Original Lines
0
Unique Lines
0
Duplicate Lines
0%
Deduplication Rate
Text Deduplicator
Remove duplicate lines from text with various deduplication options and statistics.
Text Deduplicator - Input Text
Text Deduplicator Tool Guide
Text Deduplicator is a free online tool that quickly removes duplicate lines from text. Supports various deduplication options, including preserving original order, case sensitivity, removing empty lines, trimming whitespace, etc. Provides detailed statistics including original line count, unique line count, duplicate line count, and deduplication rate. Real-time deduplication with instant results. All processing is done locally in your browser, text is never uploaded to the server, fully protecting your privacy and data security.
Multiple deduplication options for flexible configuration
100% local processing, privacy and security
Detailed statistics, clear and intuitive
Tool Features
Flexible Deduplication Option Configuration
Supports various deduplication options for flexible configuration. Preserve order option: keeps the first occurrence of each line, maintaining original text order. Case sensitive option: choose whether to perform case-sensitive deduplication. Remove empty lines option: automatically removes empty lines for cleaner results. Trim whitespace option: automatically trims leading and trailing spaces from each line to avoid deduplication failures due to spaces. All options take effect in real-time, updating results immediately after changes.
Detailed Statistics Display
Provides detailed statistics cards including original line count, unique line count, duplicate line count, and deduplication rate. Statistics are displayed in colorful cards for clarity and intuitiveness. Deduplication rate is automatically calculated to show deduplication effectiveness. Statistics update in real-time, recalculating after each option change or text input.
Convenient Operations and Result Management
Provides clear input and output areas, supports large text deduplication. Deduplication results are displayed in real-time in the output area for easy viewing and comparison. Supports one-click copying of deduplication results for use in other purposes. Provides clear function to quickly reset input and output areas. All operations are done locally in the browser, protecting privacy.
How to Use
- 1
Enter or Paste Text
Enter or paste the text you want to deduplicate in the input area. Each line is one record, and the tool will automatically identify and process it. Text deduplication is automatically triggered after input, no button clicking required.
- 2
Configure Deduplication Options
Select the options you need in the deduplication options area. Available options include: preserve order (keep first occurrence of each line), case sensitive (whether to perform case-sensitive deduplication), remove empty lines (automatically remove empty lines), trim whitespace (automatically trim leading and trailing spaces from each line). After selecting options, deduplication results will be updated immediately.
- 3
View Statistics and Copy Results
After deduplication is complete, you can view the statistics cards to understand original line count, unique line count, duplicate line count, and deduplication rate. You can click the "Copy" button to copy deduplication results, or click the "Clear" button to clear input and output content.
Frequently Asked Questions
Is deduplication case-sensitive?
By default, deduplication is case-sensitive. If you need case-insensitive deduplication, you can uncheck the "Case Sensitive" option. For example, "Hello" and "hello" will be considered different lines by default, but after unchecking case sensitive, they will be considered duplicate lines.
Will my text be uploaded to the server?
No, all processing is done in your browser. Your text content never leaves your device, fully protecting your privacy.
Will the order change after deduplication?
By default, the tool preserves the original order, keeping the first occurrence of each line and removing subsequent duplicate lines. This keeps the deduplicated text in the same order as the original. If you uncheck the "Preserve Order" option, the order after deduplication may change.
How do I remove empty lines?
You can check the "Remove Empty Lines" option to automatically remove empty lines from the text. This option will first delete all empty lines before deduplication, making the results cleaner. After empty lines are removed, the remaining text lines will be deduplicated.
What does the trim whitespace option do?
After checking the "Trim Whitespace" option, the tool will automatically trim leading and trailing spaces from each line before deduplication. This feature can prevent deduplication failures due to spaces. For example, "Hello" and " Hello " will be recognized as duplicate lines after trimming whitespace.
Share This Tool
Share this useful tool with your friends and colleagues
Related Tools
Text Sorter
Sort text lines with various sorting methods including alphabetical, numerical, and length-based sorting.
SortText
Text Cleaner
Clean and format text by removing extra spaces, special characters, empty lines, and more.
CleanText
Text Diff
Compare differences between two texts with highlighted additions, deletions, and modifications.
CompareDiff