Remove Duplicate Lines
Efficiently remove duplicate lines from your text based on chosen criteria.
Input Text
Processed Text
🧽 Remove Duplicate Lines from Text – Free Online Deduplication Tool
NotepadHub’s Remove Duplicate Lines tool is a powerful yet simple way to instantly clean up repetitive content. Whether you're working with lists, logs, exported data, or any large block of text, this tool helps you automatically identify and eliminate identical lines — leaving you with a unique, concise, and streamlined result. 📄✂️
📌 Why Remove Duplicate Lines?
Duplicates can clutter documents, inflate datasets, and cause confusion in code, content, or reports. They're especially common when consolidating multiple sources or performing bulk data operations. With just one click, our tool ensures that every line appears only once — ideal for reducing redundancy and enhancing clarity.
⚙️ Key Features
- 🗑️ Detects and removes exact duplicate lines
- 🪄 Works instantly with any size of input
- 🔄 Maintains original order (or you can sort after using Sort Text)
- 📋 One-click copy of cleaned output
- 🌗 Light and dark mode support
- 📱 Fully mobile responsive
- 🔒 Client-side only — your data stays in your browser
🎯 Common Use Cases
- ✅ Cleaning email or contact lists
- 🔁 Filtering repeated questions or answers in surveys
- 📚 Managing entries in bibliographies or references
- 🧑💻 Tidying up log files, JSON lines, or database exports
- 📑 Editing scripts, tags, or product descriptions with repetitive entries
🛠️ How to Use
- Paste or type your text into the input area
- Click “Remove Duplicates”
- All repeated lines will be removed automatically
- Click “Copy” to use your cleaned text
🔗 Enhance Your Workflow with NotepadHub Tools
After deduplication, you can further optimize your content using other helpful tools from our Text Tools suite:
- 🧹 Eliminate blank lines with Remove Empty Lines
- ✂️ Flatten messy paragraphs using Remove Line Breaks
- 🧼 Clean up extra spacing with Remove Extra Spaces
- 🔠 Fix formatting using Convert Case
- 🔍 Make substitutions via the Find and Replace Tool
- 📊 Count lines, words, and characters with Word Counter
- 📧 Identify email addresses using the Email Extractor
- 🔗 Extract all URLs with our URL Extractor
- 😶 Remove all emojis using the Remove Emojis
- 📋 Compare input/output using the Difference Checker
- 🔃 Reverse the line order with Reverse List
- 🗂️ Sort results alphabetically with Sort Text
- 👨💻 Test the result inside the Online HTML Compiler
- 📝 Tweak and save in the Classic Notepad
🔐 Privacy First
All your data is processed on your device, not our servers. Nothing is uploaded, saved, or logged. This means your content — whether personal, sensitive, or confidential — remains secure and private at all times.
🌐 Available Anywhere
Use this tool on any device — desktop, tablet, or smartphone — without any download or installation. Whether you're working in Chrome, Firefox, Safari, Edge, or mobile browsers, our tools adapt seamlessly.
📈 Save Time and Improve Efficiency
Manually scanning for repeated lines can take hours. This tool simplifies the task, helping you focus on what really matters — whether that’s publishing clean content, processing user feedback, or preparing reports.
✅ Try It Now
Paste your text, click once, and get a deduplicated version in seconds. Use it for content creation, data cleaning, or editing — it's fast, free, and fully browser-based. Then explore our other tools to finish polishing your content.
Built by NotepadHub — your trusted source for free, no-login, browser-first productivity tools.