What is text deduplication?

Text deduplication removes duplicate elements (lines, words, characters, etc.) from text content, keeping only the first occurrence of each unique item. This is a common data cleaning operation used for processing logs, lists, keywords, and more.

What does the case-sensitive option do?

When case-sensitive is on, "Hello" and "hello" are treated as different items. When off, they are considered duplicates and only the first occurrence is kept.

How does the regex dedup mode work?

Regex dedup mode first extracts all matches of the regex pattern from the text, then deduplicates the matched results. For example, with text and regex \d+, it extracts all numbers and deduplicates them.

What is the trim whitespace option for?

When enabled, leading and trailing whitespace is removed from each item before comparison. For example, " hello" and "hello " are treated as the same item. This is useful when processing data with extra spaces.

Text Deduplication Tool

Online text deduplication — supports line-level, word-level, character-level, and regex-based dedup modes

Mode: Case Sensitive Trim Whitespace Sort Results

Input Text

Text Deduplication Guide

Dedup Modes

By Line — remove duplicate lines, ideal for list data
By Word — remove duplicate words/tokens
By Character — remove duplicate characters
By Regex — deduplicate matches of a regex pattern

Options

Case Sensitive — controls whether "ABC" and "abc" are considered the same
Trim Whitespace — trim leading/trailing whitespace before comparison
Sort Results — sort deduplicated results alphabetically
Real-time Stats — shows original count, unique count, and dedup rate

Text Deduplication Tool

Text Deduplication Guide

Dedup Modes

Options

常见问题

相关工具