Remove duplicates, add/remove line numbers, and clean whitespace from text.
This free text cleaner provides three powerful utilities in one tool: duplicate line removal, line number management, and whitespace cleanup. Whether you're processing data exports, cleaning up code, or formatting lists, this tool handles the tedious text manipulation tasks so you don't have to do them manually.
Text cleaning is the process of removing unwanted characters, formatting, or redundant content from a block of text to make it usable for a specific purpose. Raw text from databases, spreadsheets, web scraping, or copy-paste operations often contains duplicate entries, inconsistent spacing, stray line numbers, or extra blank lines that need to be removed before the data can be used effectively.
Manual text cleaning is tedious and error-prone, especially with large datasets. This tool automates the most common cleaning tasks, processing hundreds or thousands of lines in milliseconds. The three modes — Remove Duplicates, Line Numbers, and Whitespace — cover the most frequent text cleaning scenarios encountered by developers, data analysts, writers, and content managers.
Each mode is designed to be intuitive and flexible. Options like case sensitivity, alphabetical sorting, custom separators, and targeted whitespace removal give you precise control over the output without requiring any programming knowledge.
Switch between the three modes using the tabs at the top of the tool. Each mode has its own input and options:
When removing duplicates from a list that may have inconsistent capitalization — like a list of names or tags — use the case-insensitive option to catch duplicates like "Apple" and "apple" as the same entry. Enable "Trim whitespace" at the same time to catch entries that differ only by leading or trailing spaces.
The "Sort alphabetically" option in the duplicates mode is useful for creating clean, organized lists from messy input. Sorting after deduplication makes it easy to scan the result for any remaining issues and produces output that's ready to use in dropdowns, autocomplete lists, or documentation.
For the whitespace mode, "Remove Extra Spaces" is the safest option — it collapses multiple consecutive spaces into one without removing intentional single spaces. Use "Remove All Spaces" only when you specifically need to strip all spacing, such as when processing code tokens or identifiers.
This tool combines three commonly needed text utilities into a single, tabbed interface. Instead of switching between multiple tools or writing a quick script to clean your data, you can handle all three operations in one place. The clean, distraction-free interface makes it fast to use even for quick one-off tasks.
Unlike command-line tools or spreadsheet formulas, this tool requires no technical knowledge. Anyone can paste text, click a button, and get clean output immediately. It works on any device with a browser, making it accessible whether you're at your desk or on the go.
Your privacy is our priority. All processing happens entirely in your browser using JavaScript. No files, data, or inputs are ever uploaded to any server. Everything stays on your device, making this tool completely safe to use with sensitive content.