📝 文字去重工具
Text Deduplication Tool
什麼是文字去重工具?
What is the Text Deduplication Tool?
文字去重工具是一款專為處理大量文字資料而設計的小工具,能快速移除重複的行,並提供忽略大小寫、去掉前後空白、排序等功能,幫助您獲得乾淨且唯一的文字清單。
The Text Deduplication Tool is designed for processing large amounts of text data. It quickly removes duplicate lines and provides options such as ignoring case, trimming spaces, and sorting, helping you get a clean and unique text list.
如何使用?
How to Use?
- 將需要處理的文字貼入左側輸入框,並在上方選項列選擇分隔符類型。
Paste text into the left input box and select a delimiter type from the options bar above. - 依需求勾選「忽略大小寫」、「去掉空白」、「排序」等選項。
Check options like "Ignore Case", "Trim Spaces", and "Sort" as needed. - 點擊「去重」按鈕,右側立即顯示結果,再點複製或下載圖示即可取用。支援 Ctrl+Enter 快速觸發。
Click "Deduplicate" — results appear instantly on the right. Use the copy or download icons to save. Ctrl+Enter also triggers deduplication.
適用情境
Applicable Scenarios
- 名單清理(如電子郵件清單、會員帳號)
Cleaning lists such as email addresses or user accounts - 資料去重(如商品名稱、標籤、分類)
Deduplicating data such as product names, tags, or categories - 文字分析前處理
Preprocessing text before analysis - 學術研究資料整理
Organizing research data
工具特色
Key Features
- 多種分隔符:支援換行、逗號、分號、空白及自訂分隔符
Supports multiple delimiters: newline, comma, semicolon, whitespace, and custom - 忽略大小寫:可將大小寫視為相同項目進行去重
Case-insensitive mode treats uppercase and lowercase as identical - 去掉前後空白:自動清除各項目首尾多餘空格
Automatically trims leading and trailing whitespace from each item - 字典序排序:可將去重結果依字母順序排列
Optional alphabetical sorting of deduplicated results - 即時統計:顯示原始行數與去重後行數
Displays original and deduplicated line counts in real time - 字元上限保護:支援最多 200,000 字元,超限自動截斷
Handles up to 200,000 characters with automatic truncation - 一鍵複製 / 下載:結果可直接複製至剪貼簿或存為文字檔
Copy results to clipboard or download as a plain text file
透過這些功能,您可以快速獲得乾淨、唯一且可用的文字資料,無論是清單整理、資料分析或學術應用皆能輕鬆完成。
With these features, you can quickly obtain clean, unique, and usable text data — ideal for list management, data analysis, or academic work.
常見問題
Frequently Asked Questions
「忽略大小寫」選項如何運作?
勾選後,系統在判斷重複時不區分大小寫,例如「Apple」、「apple」、「APPLE」視為同一項目,最終保留第一次出現的原始大小寫形式。這對清理電子郵件清單(如 [email protected] 和 [email protected])特別有用。
When enabled, the tool treats "Apple", "apple", and "APPLE" as identical during deduplication, keeping the first occurrence's original casing. This is especially useful for cleaning email lists where capitalization varies.
自訂分隔符可以輸入什麼?
選擇「自訂」後,可輸入任意字串作為分隔符,例如「|」(管道符)、「---」、Tab 字元(\t)等。適用於處理 CSV 變體格式或自訂資料結構。若分隔符包含正則表達式特殊字元,工具會做基本跳脫處理。
You can enter any string as a custom delimiter — pipe (|), triple dash (---), tab (\t), etc. Useful for processing non-standard CSV formats or custom data structures. Special regex characters in the delimiter are automatically escaped.
去重後結果的順序是什麼?
預設情況下,去重結果按照項目在原始文字中第一次出現的順序排列(先進先留)。若勾選「排序」選項,則依字典序(Unicode 碼位)重新排列,中文按筆畫/注音順序可能因瀏覽器環境而有些差異。
By default, results follow the order of first occurrence (first-seen wins). Enabling "Sort" reorders alphabetically by Unicode code point. Chinese character ordering may vary slightly by browser locale settings.
最多可以處理多少資料?
工具支援最多 200,000 字元的輸入,超過限制時自動截斷並提示。對於超大型資料集(如數十萬行記錄),建議改用程式語言工具(如 Python 的 set() 或 SQL DISTINCT 語句),本工具定位為輕量線上快速處理。
The tool handles up to 200,000 characters and auto-truncates beyond that. For very large datasets (hundreds of thousands of records), consider using Python (set()) or SQL (DISTINCT) — this tool is designed for quick online processing.
可以下載去重後的結果嗎?
可以。點擊右側結果欄上方的下載圖示,即可將去重結果存為 .txt 純文字檔案,使用換行符分隔每個項目。若原始使用逗號或分號分隔,下載的檔案仍以換行符分隔,方便後續逐行處理。
Yes. Click the download icon above the result panel to save the deduplicated output as a .txt file, with each item on a new line. Even if the original input used commas or semicolons, the downloaded file uses newlines for easy line-by-line processing.
文字去重和資料庫 DISTINCT 有什麼差別?
功能目標相同(移除重複),但應用場景不同。資料庫 DISTINCT 作用於查詢結果的行(row),可針對特定欄位去重並保留其他欄位。本工具處理的是純文字字串,以行或指定分隔符為單位,適合無需資料庫環境的輕量資料清理需求。
Both remove duplicates, but in different contexts. Database DISTINCT operates on query rows and can target specific columns while preserving others. This tool processes plain text strings by line or delimiter — ideal for lightweight data cleaning without a database environment.
相關工具
Related Tools
為什麼選擇這個工具?
Why Choose This Tool?
它結合了常用的去重需求與彈性選項,介面簡潔直觀,操作快速,即使面對大量資料也能高效處理,避免重複帶來的困擾。
It combines essential deduplication features with flexible options, a clean interface, and fast processing — effective even with large datasets.