Remove duplicate lines from text lists instantly. Sort lines, remove empty lines, and clean up data. Free online list cleaner.
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What is Remove Duplicate Lines?
The Remove Duplicate Lines tool is a data cleaning utility designed to help you organize lists of text. Whether you have a list of email addresses, inventory items, or database records, duplicates can cause errors and confusion. This tool automatically scans your text, identifies identical lines, and removes the extras, leaving you with a clean, unique list. It also offers options to sort the data alphabetically (A-Z or Z-A) and remove empty lines, making it an essential tool for data preparation and management.
Input Formats
Unsorted lists
CSV data (line separated)
Log files
Output Results
Unique list
Sorted data
Line count statistics
Key Features
Instant Cleaning: Deduplicate thousands of lines in milliseconds
Sorting Options: Automatically sort your list A-Z or Z-A
Whitespace Control: Strip empty lines for a cleaner output
Privacy: 100% Client-side processing; safe for email lists and data
Case Sensitivity: Choose whether to treat 'Apple' and 'apple' as duplicates
Data Prep: Essential for cleaning CSVs and database exports
Original Order: Option to maintain the original sequence of items
Amazing & Fast: The most amazing fast list cleaner for data
Shareable LinksShare the cleaned list. (Limit: 10KB)
Who is this for?
Email Marketing
Cleaning up email lists to ensure you don't send the same message to a subscriber twice.
Email list cleaningDeduplicationMarketing tools
Database Management
Preparing data for import by removing duplicate records from CSV exports.
Data prepSQL importCSV cleaner
Programming
Removing duplicate log entries or configuration lines to simplify debugging.
Log analysisConfig cleanupDev tools
How to Use
1
Paste your list into the input area.
2
The tool automatically removes duplicates.
3
Use the options to Sort or Remove Empty Lines.
4
Copy the cleaned list.
Examples
Input
Apple
Banana
Apple
Orange
Output
Apple
Banana
Orange
Frequently Asked Questions
Is it case sensitive?
Yes. By default, 'Apple' and 'apple' are different. You can change this in the settings.
Does it sort the list?
Only if you want it to. You can choose A-Z, Z-A, or keep the original order.
How many lines can I process?
Thousands! I'm very fast. Paste huge lists and I'll clean them instantly.
Does it remove empty lines?
Yes, I have a checkbox for that. It makes your list look much cleaner.
Can I keep the original order?
Yes! If you don't pick a sort option, I'll just remove the duplicates and keep the first one I found.
Does it work with CSV files?
Yes. I treat each line as an item. If you have a CSV, I'll remove duplicate rows.
Is my data uploaded?
No. Everything happens on your device. Your email lists and data are safe.
Can I ignore leading/trailing whitespace?
I compare lines exactly. It's best to trim your data first if your spaces are messy.
