Remove Duplicate Lines
Free tool to remove duplicate lines from text instantly. Options for case-sensitive matching, alphabetical sorting, and count of removed duplicates.
How to Use Remove Duplicate Lines
Paste Text
Paste text with one item per line.
Set Options
Choose case sensitivity and sort.
Remove Duplicates
Click to see deduplicated text.
Who Uses Remove Duplicate Lines?
Data analysts cleaning CSV data, developers removing log file duplicates, SEO professionals deduplicating keyword lists, email marketers cleaning lists.
Why Use Our Remove Duplicate Lines?
Instantly removes duplicates
Case-sensitive and insensitive options
Optional alphabetical sorting
Shows removal count
Frequently Asked Questions
Does it preserve the original order?
Yes, by default duplicate lines are removed while keeping the first occurrence in its original position. Enable sorting to alphabetize the output.
Is the comparison case-sensitive?
By default yes. You can toggle case-insensitive mode to treat Hello and hello as duplicates.
Can I process large files?
Yes, our tool handles large text inputs. Processing happens in your browser so there are no server-side limits.
Does it remove blank lines?
Blank lines are treated like any other line. If there are multiple blank lines, duplicates will be removed leaving one.
Can I use this for CSV data?
Yes, each row in a CSV file is treated as a line. The tool will remove duplicate rows. For column-specific deduplication, you would need a spreadsheet tool.