Duplicate Remover

The Online List Duplicate Remover is a powerful and easy-to-use tool that removes duplicate lines from lists instantly. Users can simply input text, and with one click, duplicates are removed. It supports case-insensitive matching, keyword filtering, multiple delimiters, and export formats. Ideal for data cleaning, content deduplication, and list management, it handles large-scale data efficiently, ensuring both speed and accuracy—an essential online tool for data analysts and office professionals.

On the Online List Duplicate Remover page, users can paste or manually enter text content, one item per line. You can also drag and drop a .txt file directly into the input box to quickly load the content. After setting the desired options, click the process button, and the system will automatically remove duplicate lines and display the result.

The case-insensitive feature allows the system to treat uppercase and lowercase letters as the same during deduplication. For example, 'Apple' and 'apple' are recognized as identical. This is especially useful for handling unstandardized text data, enabling more thorough duplicate detection and improved results.

The Online List Duplicate Remover provides two keyword filter options: exclude keywords and include keywords. Exclude keywords will filter out lines containing specific words; include keywords will only retain lines containing specific words. Users just need to check the corresponding option and enter keywords in the text box (one per line), and the system will filter while deduplicating.

The Online List Duplicate Remover supports various delimiters including line breaks, commas, semicolons, tabs, spaces, and custom delimiters to accommodate different data formats. Export formats supported include TXT plain text, CSV, and Excel-compatible CSV (with BOM), making it easy for users to import results into office and data analysis software.

The Online List Duplicate Remover uses efficient algorithms and front-end processing techniques to handle large amounts of text data. For typical list deduplication needs, tens of thousands of lines can be processed quickly. Since all processing is done locally in the browser without uploading to the server, data security and privacy are also ensured.

The Online List Duplicate Remover is completely free to use, requiring no registration, login, or payment. Users can access duplicateRemover.online anytime to remove duplicates from lists, enjoying a fast, simple, and efficient online text processing experience.