Remove Duplicates
Local ProcessingRemove duplicate lines, words or sentences, and empty items.
How It Works & Processing Standards
Remove duplicate lines, words or sentences, and empty items.
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Current Limits
- Maximum input length: 2,000,000 characters
Choose duplicate lines, words, sentences or empty items under "Task". The original order is kept and only the first occurrence stays.
What You Can Do
- Duplicate lines
- Keeps one of each line and reports how many were removed.
- Duplicate words and sentences
- Removes repeated words or sentences within the text.
- Empty items
- Removes only empty lines or items.
How to Use Remove Duplicates
- 1Choose a taskPick what to deduplicate.
- 2Set optionsIgnore case to treat "Apple" and "apple" as the same; ignore spaces to disregard leading and trailing spaces.
- 3CopyCopy the cleaned list.
Examples
Duplicate lines
Input: 사과 / 바나나 / 사과 / 포도 / 바나나
Result: 사과 / 바나나 / 포도 (5 lines → 3)
Duplicate words
Input: 빨강 파랑 빨강 초록 파랑
Result: 빨강 파랑 초록
Common Use Cases
- Cleaning duplicates from an email or phone list
- Removing overlaps after merging keyword lists
- Filtering repeated survey submissions
Frequently Asked Questions (FAQ)
Which item is kept?
The first occurrence stays and later repeats are removed. The order is unchanged.
What about duplicate CSV rows?
Use the CSV Duplicate Row Remover to keep the column structure.